| 650+350= | 7000-320= | 1- = | 63÷8= | 660÷3= |
| 600×7= | + = | 34÷7= | 120×4= | 270+90= |
- = | 6×6+5= | 740-700= | 3200÷8= | + = |
| 650+350=1000, | 7000-320=6680, | 1- = , | 63÷8=7…7, | 660÷3=220, |
| 600×7=4200, | + = , | 34÷7=4…6, | 120×4=480, | 270+90=360, |
- = , | 6×6+5=41, | 740-700=10, | 3200÷8=400, | + =1. |
分析:根据整数和分数加减乘除法的计算方法进行口算即可.
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
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