题目内容
直接写出得数
1-0.25= | 3.4+1.6= | 4.3-0.8= | 2.7+8.4= | 10.2-2= | 4.9×1000= |
0.5×0.3= | 3.26÷100= | 0.25×4= | 3.06÷1000= | 14×0.2= | 12.5÷10= |
20×0.4= | 0.87-0.6= | 1.1×0.4= | 0.73+1.23= | 9.7×100= | 1.25×8= |
分析:根据小数加减乘除的计算方法进行计算即可.
解答:解:
1-0.25=0.75, | 3.4+1.6=5, | 4.3-0.8=3.5, | 2.7+8.4=11.1, | 10.2-2=8.2, | 4.9×1000=4900, |
0.5×0.3=0.15, | 3.26÷100=0.0326, | 0.25×4=1, | 3.06÷1000=0.00306, | 14×0.2=2.8, | 12.5÷10=1.25, |
20×0.4=8, | 0.87-0.6=0.27, | 1.1×0.4=0.44, | 0.73+1.23=1.93, | 9.7×100=970, | 1.25×8=10. |
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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