Bài kiểm tra 15 phút thực hành lớp 10 Môn: Toán

<span class='text_page_counter'>(1)</span>Trường THPT Nguyễn Việt Khái BÀI KIỂM TRA 15 PHÚT THỰC HÀNH Họ và tên:………………………………………….lớp 10:…..Môn: Toán . . ……/ / 2010. Điểm. Lời phê của thầy cô. Sử dụng máy tính bỏ túi để giải các bài toán sau Cho bảng phân bố tần số ghép lớp sau: Khối lượng của 40 túi đường được đóng gói bởi tổ B ( Đơn vị: kg) Lớp khối lượng (kg) [1,49 ; 1,71) [1,71 ; 1,89) [1,89 ; 2,11) [2,11 ; 2,29) [2,29 ; 2,51] Cộng. Tần số 3 5 23 5 4 40. Bảng 1. Tính số trung bình, phương sai, và độ lệch chuẩn của bảng 1 BÀI LÀM .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... Lop10.com. 1.

<span class='text_page_counter'>(2)</span> Trường THPT Nguyễn Việt Khái BÀI KIỂM TRA 15 PHÚT THỰC HÀNH Họ và tên:………………………………………….lớp 10:…..Môn: Toán . . ……/ / 2010. Điểm. Lời phê của thầy cô. Sử dụng máy tính bỏ túi để giải các bài toán sau Cho bảng phân bố tần số ghép lớp sau: Cân nặng của 38 học sinh lớp 10A Lớp khối lượng (kg) [30 ; 36) [36 ; 42) [42 ; 48) [48 ; 54) [54 ; 60) [60 ; 66] Cộng. Tần số 1 2 5 15 9 6 38. Bảng 1. Tính số trung bình, phương sai, và độ lệch chuẩn của bảng 1 BÀI LÀM .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... Lop10.com. 2.

<span class='text_page_counter'>(3)</span> Trường THPT Nguyễn Việt Khái BÀI KIỂM TRA 15 PHÚT THỰC HÀNH Họ và tên:………………………………………….lớp 10:…..Môn: Toán . . ……/ / 2010. Điểm. Lời phê của thầy cô. Sử dụng máy tính bỏ túi để giải các bài toán sau Cho bảng phân bố tần số ghép lớp sau: Khối lượng của 40 túi đường được đóng gói bởi tổ ( Đơn vị: kg) Lớp khối lượng (kg) [1,9 ; 1,98) [1,98 ; 2,06) [2,06 ; 2,14) [2,14 ; 2,22) [2,22 ; 2,3] Cộng. Tần số 17 17 3 2 1 40. Bảng 1. Tính số trung bình, phương sai, và độ lệch chuẩn của bảng 1 BÀI LÀM .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... Lop10.com. 3.

<span class='text_page_counter'>(4)</span> Trường THPT Nguyễn Việt Khái BÀI KIỂM TRA 45 PHÚT Họ và tên:………………………………………….lớp 10:…..Môn: Toán . . ……/ Điểm. / 2010.. Lời phê của thầy cô. Bài 1: (5 điểm) Cho bảng phân bố tần số ghép lớp sau: Khối lượng của 40 túi đường được đóng gói bởi tổ A ( Đơn vị: kg) Lớp khối lượng (kg) [1,9 ; 1,98) [1,98 ; 2,06) [2,06 ; 2,14) [2,14 ; 2,22) [2,22 ; 2,3] Cộng. Tần số 17 17 3 2 1 40. Bảng 1. a) Hãy lập bảng phân bố tần suất ghép lớp. b) Vẽ biểu đồ tần suất hình cột mô tả bảng 1. c) Dựa vào kết quả ở câu a nêu nhận xét về khối lượng của 40 túi đường nói trên. Bài 2: (3 điểm) Giải các bất phương trình sau: a) – 7x2 – x + 6 > 0 b).  x2  2x  3 2 x 2  3x  1. 0. Bài 3: (2 điểm) Tìm giá trị của tham số m để phương trình sau vô nghiệm. x2 + 2(2m – 3)x + 2m – 3 = 0. BÀI LÀM .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... ........................................................................................................................................................... Lop10.com. 4.

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<span class='text_page_counter'>(6)</span> Trường THPT Nguyễn Việt Khái BÀI KIỂM TRA 45 PHÚT Họ và tên:………………………………………….lớp 10:…..Môn: Toán . . ……/ Điểm. / 2010.. Lời phê của thầy cô. Bài 1: (5 điểm) Cho bảng phân bố tần số ghép lớp sau: Thành tích nhảy xa của 45 học sinh lớp 10A. Lớp thành tích (m) [2,2 ; 2,4) [2,4 ; 2,6) [2,6 ; 2,8) [2,8 ; 3,0) [3,0 ; 3,2) [3,2 ; 3,4] Cộng. Tần số 3 6 12 11 8 5 45. Bảng 1. a) Hãy lập bảng phân bố tần suất ghép lớp. b) Vẽ biểu đồ tần suất hình cột mô tả bảng 1. c) Dựa vào kết quả ở câu a nêu nhận xét về thành tích của 45 học sinh nói trên. Bài 2: (3 điểm) Giải các bất phương trình sau: a) 4x2 – x - 3 < 0 b). x2  2x  3  2 x 2  3x  1. 0. Bài 3: (2 điểm) Tìm giá trị của tham số m để phương trình sau vô nghiệm. x2 - 2(3m – 4)x + 3m - 4= 0. BÀI LÀM .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... Lop10.com. 6.

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<span class='text_page_counter'>(8)</span> Trường THPT Nguyễn Việt Khái BÀI KIỂM TRA 45 PHÚT Họ và tên:………………………………………….lớp 10:…..Môn: Toán . . ……/ Điểm. / 2010.. Lời phê của thầy cô. Bài 1: (5 điểm) Cho bảng phân bố tần số ghép lớp sau: Khối lượng của 85 con lợn. Lớp khối lượng (kg) [45 ; 55) [55 ; 65) [65 ; 75) [75 ; 85) [85 ; 95] Cộng. Tần số 10 20 35 15 5 85. Bảng 1. a) Hãy lập bảng phân bố tần suất ghép lớp. b) Vẽ biểu đồ tần suất hình cột mô tả bảng 1. c) Dựa vào kết quả ở câu a nêu nhận xét về khối lượng của 85 con lợn nói trên. Bài 2: (3 điểm) Giải các bất phương trình sau: a) x2 + 6x + 9 < 0 b). x 2  x  30 x 2  x  20. 0. Bài 3: (2 điểm) Tìm giá trị của tham số m để phương trình sau vô nghiệm. x2 + 2(m + 1)x + m + 1 = 0. BÀI LÀM .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... .......................................................................................................................................................... Lop10.com. 8.

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