| 25×16×0.125= | ![]() = | 075+ = |
| 8.7÷0.03= | 4.37+8.8= | ( + + )×12= |
| 0.322= | ÷ = | ×80%= |
| 4700+800= |
| 25×16×0.125=50, | ![]() = , | 0.75+ =0.95, |
| 8.7÷0.03=290, | 4.37+8.8=13.17, | ( + + )×12=9, |
| 0.322=0.1024, | ÷ = , | ×80%=0.6, |
| 4700+800=5500. |
分析:根据小数和分数加减乘除的计算方法进行计算;
25×16×0.125根据乘法交换律和结合律进行计算;
(
+
+
)×12根据乘法分配律进行计算.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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=
÷
×80%=
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