Tài liệu kiêm tr toán 6

Trường THCS Đặng Chánh kỷ Thứ 2 ngày 17 tháng 01 năm 2011
Họ và tên:................................. Kiểm tra 1 tiết chương 2
Lớp 6C (Đề 1) Môn : Số học
Đề bài:
Bài1: (5đ) Tìm x
∈
Z biết:
a/ 2x – (- 27) = 15 b/ -13
1
−
x
= - 39
c/
x
< 5 d/ 2(x-1) – 3(x+2) = 2(2x+1)
e/
( )
2
12
−
x
= 49 f/ x+18 = 2x + 35
g/ (x+1) +(x+2) + (x+3)+ ......+(x+100) = 20550 h/ 2x +5

x +1
Bài2: (4 đ) Tính tổng đại số sau: (Tính nhanh nếu có thể)
a/ 233 – 476 – 124 + 767 b/ 126-(-4) +7 -20
c/ 101 -102-(-103)-104-(-105)-106-........- 2010 d/ (- 158).56 + 43.(-158) +(-158)
Bài3: (1 đ) Biết a-b

6 . Chứng tỏ rằng a + 17b


6
Bài làm:
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Trường THCS Đặng Chánh kỷ Thứ 2 ngày 17 tháng 01 năm 2011

Họ và tên:................................. Kiểm tra 1 tiết chương 2
Lớp 6C (Đề2) Môn : Số học
Đề bài:
Bài1: (5đ) Tìm x
∈
Z biết:
a/ 2x – (-37) = 15 b/ -13
1
−
x
= - 26
c/
x
< 6 d/ 2(x-1) – 3(x+2) = 2(2x+1)
e/
( )
2
12
−
x
= 81 f/ x+28 = 2x + 55
g/ (x+1) +(x+2) + (x+3)+ ......+(x+100) = 20550 h/ 2x - 5

x - 1
Bài2: (4 đ) Tính tổng đại số sau: (Tính nhanh nếu có thể)
a/ 253 – 576 – 324 + 747 b/ 326-(-4) +7 - 120
c/ -101 –(-102) – 103 –( -104) -105 –(-106)-.....-(- 2010) d / (- 258).56 + 43.(-258) +(-258)
Bài3: (1 đ) Biết a+b

6 . Chứng tỏ rằng a + 19b


6
Bài làm:
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