| 直接写得数. 3.6+5.4= | 650-100= | 0.008×1000= | 70÷0.01= |
| 2.8×0.5= | 25÷ = | 8.1÷0.03= | +3= |
× = | - = | 1÷ = | × = |
+ + = | ×0.25= | -0.6=1-7%= |
| 3.6+5.4=9, | 650-100=550, | 0.008×1000=8, | 70÷0.01=7000, |
| 2.8×0.5=1.4, | 25÷ =100, | 8.1÷0.03=270, | +3=3 , |
× = , | - = , | 1÷ = , | × = , |
+ + =1 , | ×0.25= , | -0.6=0,1-7%=0.93. |
分析:0.008×1000把0.008的小数点向右移动三位即可;70÷0.01把70小数点向右移动两位即可;
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运用加法交换律简算;其它题目根据运算法则直接求解.点评:本题考查了基本的运算,计算时要细心,注意把结果化成最简分数.
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