De thi chon HSG vao lop 3 (chuan)

Thi chọn HSG vào lớp 3 ( 7 / 7/ 2010)
Môn :Toán
Thời gian:60 phút

Họ và tên :...........................................................................

Bài 1:Tính:
a, 40 : 5 + 168 b, 4 9 – 28 c, 189 – 98 + 278
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Bài 2: Tìm x:
a, x 4 = 4 8 b, x – 3 – 4 – 5 = 36
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d, x : 3 – 5 = 4 d, x 5 = 245- 340
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Bài 3: Tính bằng cách thuận tiện nhất:
a, 191 + 345 + 598 – 145 – 91 – 298 b,99 – 9 + 9 +9 +... + 9 (10 số 9)
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c, 2 +2 +2 + 2 + 2 3 d, 25 – 16 + 75 -34
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Bài 4: Hình vẽ sau có mấy hình tam giác, có mấy hình tứ giác? Kể tên các hình đó?




............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Bài 5: Hùng có 21 viên bi, Hùng có nhiều hơn Dũng 9 viên bi.Hỏi cả hai bạn có bao nhiêu viên bi?
Bài giải
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Bài 6: Một hình tứ giác có độ dài các cạnh bằng nhau và bằng 4cm. Em hãy tính chu vi của tứ giác đó bằng cách ngắn gọn nhất.
Bài giải

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