题目内容
口算
0.6+1.3= | 8.9-5= | 2+0.78= | 8×0.9= |
0.32×0.2= | 32.1×0.3= | 7.5-0.3= | 3.2÷0.08= |
5.6÷7= | 9.5-7.65= | 8.4÷0.2= | 5.8+4.6= |
分析:根据小数加减乘除的计算方法进行计算即可.
解答:
解:0.6+1.3=1.9, | 8.9-5=3.9, | 2+0.78=2.78, | 8×0.9=7.2, |
0.32×0.2=0.064, | 32.1×0.3=9.63, | 7.5-0.3=7.2, | 3.2÷0.08=40, |
5.6÷7=0.8, | 9.5-7.65=1.85, | 8.4÷0.2=42, | 5.8+4.6=10.4. |
点评:口算时,注意运算符号和数据,然后再进一步计算即可.
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