| 0.47×200= | 70÷0.35= | 1.8-0.56= | 2.25×4= | 40÷45= |
| 0.22×5= | + = | 10- = | ÷ = | - × = |
| 解:0.47×200=94, | 70÷0.35=200, | 1.8-0.56=1.24, | 2.25×4=9, | 40÷45= , |
| 0.22×5=0.2, | + = , | 10- =9 , | ÷ = , | - × = . |
分析:0.22×5,先计算0.22得0.04,再用0.04×5得0.2;
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,先计算乘法,再计算减法;其它算式按照整数、分数、小数的四则运算的方法进行计算.
点评:掌握分数、整数和小数的四则运算的计算方法,正确计算即可.
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