- = | 34+18= | 52-4= | 0÷ = |
| 0.6×100= | 13-9= | 7.31+0.7= | ×48= |
| 10-3.9= | 0.52= | × = | 26×5= |
2- = | 5÷2%= | ÷ = | 6÷ = |
| 7.5+4.5= | = | 4÷0.2= | 0.375÷3= |
| 20÷8= |
解:
- = , | 34+18=52, | 52-4=48, | 0÷ =0, |
| 0.6×100=60, | 13-9=4, | 7.31+0.7=8.01, | ×48=30, |
| 10-3.9=6.1, | 0.52=0.25, | × = , | 26×5=130, |
2- =1 , | 5÷2%=250, | ÷ = , | 6÷ =8, |
| 7.5+4.5=12, | = , | 4÷0.2=20, | 0.375÷3=0.125, |
| 20÷8=2.5. |
分析:根据分数、小数和整数加减乘除的计算方法进行计算.
点评:口算时,注意运算符号和数据,然后再进一步计算.
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