题目内容
口算.
| 62+18= | 50-24= | 31÷7= | (20-4)÷4= | 4×9= | 21÷3= |
| 62+18=80, | 50-24=26, | 31÷7=4…3, | (20-4)÷4=4, | 4×9=36, | 21÷3=7. |
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| 62+18= | 50-24= | 31÷7= | (20-4)÷4= | 4×9= | 21÷3= |
| 62+18=80, | 50-24=26, | 31÷7=4…3, | (20-4)÷4=4, | 4×9=36, | 21÷3=7. |