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1. 直接写出得数。
$72 + 28 =$
$17 × 4 =$
$28 × 5 =$
$(4 + 6) × 9 =$
$6 × 104 =$
$90 × 5 =$
$84 + 21 =$
$5 × 7 - 13 =$
$51 - 33 =$
$72 × 4 =$
$600 × 8 =$
$24 ÷ 3 ÷ 2 =$
$200 × 4 =$
$160 × 6 =$
$36 ÷ 6 =$
$90 × 6 + 24 =$
$150 × 5 =$
$3 × 42 =$
$24 × 5 =$
$80 + 20 × 4 =$
$20 + 600 =$
$120 × 4 =$
$6 × 900 =$
$6 × 6 × 3 =$
$204 × 3 =$
$30 × 6 =$
$112 × 5 =$
$85 + (110 - 55) =$
$46 × 4 =$
$170 × 3 =$
$800 × 5 =$
$157 - 7 × 20 =$
$72 + 28 =$
$17 × 4 =$
$28 × 5 =$
$(4 + 6) × 9 =$
$6 × 104 =$
$90 × 5 =$
$84 + 21 =$
$5 × 7 - 13 =$
$51 - 33 =$
$72 × 4 =$
$600 × 8 =$
$24 ÷ 3 ÷ 2 =$
$200 × 4 =$
$160 × 6 =$
$36 ÷ 6 =$
$90 × 6 + 24 =$
$150 × 5 =$
$3 × 42 =$
$24 × 5 =$
$80 + 20 × 4 =$
$20 + 600 =$
$120 × 4 =$
$6 × 900 =$
$6 × 6 × 3 =$
$204 × 3 =$
$30 × 6 =$
$112 × 5 =$
$85 + (110 - 55) =$
$46 × 4 =$
$170 × 3 =$
$800 × 5 =$
$157 - 7 × 20 =$
答案
1. 100 68 140 90
624 450 105 22
18 288 4800 4
800 960 6 564
750 126 120 160
620 480 5400 108
612 180 560 140
184 510 4000 17
624 450 105 22
18 288 4800 4
800 960 6 564
750 126 120 160
620 480 5400 108
612 180 560 140
184 510 4000 17
2. 用竖式计算。
68×7=
369×6=
305×8=
890×5=
118×8=
485×7=
68×7=
369×6=
305×8=
890×5=
118×8=
485×7=
答案
2. 476 2214 2440
4450 944 3395
（竖式略）
4450 944 3395
（竖式略）
3. 观察下图，判断从第1幅图到最后1幅图每次发生了怎样的变化。（填“平移”或“旋转”）
答案
3.（1）旋转 平移
旋转 旋转
（2）平移 旋转
旋转 平移
旋转 旋转
（2）平移 旋转
旋转 平移
