| 2005-1998= | 1.6×0.05= | 5.7÷0.19= | 0.125×0.7= |
÷ = | ÷6= | ÷ = | 40× = |
÷ = | ×12= | × = | ×201- = |
解:
| 2005-1998=7, | 1.6×0.05=0.08, | 5.7÷0.19=30, | 0.125×0.7=0.0875, |
÷ = , | ÷6= , | ÷ = , | 40× =16 , |
÷ = , | ×12=9, | × = , | ×201- =56. |
分析:0.125×0.7先把0.7变成0.8-1,再运用乘法分配律简算;
×201-
运用乘法分配律简算;其它题目根据运算法则直接计算.点评:本题考查了基本的运算,计算时要细心,把计算结果化成最简分数.
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