| ①10-4.7= | ② ÷5.25= | ③ ÷ = | ④1÷ = | ⑤4÷9× = |
| ⑥3.5÷40= | ⑦ +6.25= | ⑧0.74×100= | ⑨12.2+8%= | ⑩15×( + )= |
| 解:①10-4.7=5.3, | ② ÷5.25=1, | ③ ÷ = , | ④1÷ = , | ⑤4÷9× =1, |
| ⑥3.5÷40=0.0875, | ⑦ +6.25=7, | ⑧0.74×100=74, | ⑨12.2+8%=12.28, | ⑩15×( + )=8. |
分析:根据小数和分数加减乘除的计算方法进行计算即可.
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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