题目内容
| 直接写出结果. 20×3= | 200-20= | 6×5+3= | 72+28= |
| 42÷7= | 24÷8= | 3×400= | 200×7= |
| 23+□=35 | □÷7=8 | 59-□=42 | 54÷□=9 |
| 4×28≈ | 102×3≈ | 46÷5≈ | 61÷7≈ |
| 20×3=60, | 200-20=180, | 6×5+3=33, | 72+28=100, |
| 42÷7=6, | 24÷8=3, | 3×400=1200, | 200×7=1400, |
| 23+(12)=35, | (56)÷7=8, | 59-(17)=42, | 54÷(6)=9, |
| 4×28≈120, | 102×3≈300, | 46÷5≈9, | 61÷7≈9. |
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