题目内容

【题目】直接写出得数。

1.57+3.03= 13.75.6= 7.5÷0.1= 0.25×8=

×12= ÷= ×= =

3.14×20= 2×= 6.4÷0.4= 21.05=

4×3.14= 300×0.01%= ×= 0.42÷8=

【答案】4.6,8.1,75,2,8,,62.8,,16,0.95,12.56,0.03,,0.02

【解析】

试题分析:按照计算的法则直接计算,小数的计算要注意小数点的位数,分数的计算要注意把结果化成最简分数;0.42÷8=0.4×0.4÷8由此求解

解:1.57+3.03=4.6, 13.75.6=8.1, 7.5÷0.1=75, 0.25×8=2,

×12=8, ÷= ×= =

3.14×20=62.8, 2×= 6.4÷0.4=16, 21.05=0.95,

4×3.14=12.56, 300×0.01%=0.03, ×= 0.42÷8=0.02

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