De th HSG lop 2

<span class='text_page_counter'>(1)</span>ĐỀ THI CHỌN HỌC SINH GIỎI NĂM HỌC 2012 -2013 Điểm. Môn: Toán lớp 2 – Lần 1 ( Thời gian: 60 phút ). Họ và tên: ………………………………………………………Lớp:………………………………….. Phần I: Viết kết quả đúng cho các bài toán sau: C©u 1: T×m x biÕt : a, 10 + x < 12. b, 3 < x < 3 + 5. Câu 2: Có 9 lít nước mắm đem đựng vào hai loại chai 2 lít và 3 lít. Hỏi có bao nhiêu chai mỗi loại? Phần II: Em hãy trình bày các bài toán sau: Câu 3: Tìm x:. a, x + 123 = 583 + 15. b, 4 x 2 x x = 40. C©u 4 : Tìm tổng, hiệu, tích, thương của số chẵn lớn nhất có 2 chữ số và số liền sau của số lẻ nhỏ nhất có 1 chữ số? Câu 5 : TÝnh nhanh 16 + 12 + 15 + 14 + 11 - 1 - 6 - 5 - 4 - 2 C©u 6 : Một của hàng sau khi bán đi 247 kg gạo thì còn lại 389kg. a, Hỏi lúc đầu cửa hàng có bao nhiêu ki – lô – gam gao? b, Sau khi bán của hàng lại nhập thêm về một số gạo đúng bằng số gạo còn lại trong kho. Hỏi khi đó cửa hàng có bao nhiêu ki – lô – gam gạo? Câu 7: H×nh bªn cã bao nhiêu h×nh tø gi¸c? Kể tên các hình tứ giác đó ?. Bài làm ....................................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ....................................................................................................................................................................................... ........................................................................................................................................................................................

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