题目内容
| 4.2+3.1= | 0÷2= | 50×20= | 2.5-1.7= |
| 200÷5= | 400×20= | 840÷4= | 30×50×0= |
| 解:4.2+3.1=7.3, | 0÷2=0, | 50×20=1000, | 2.5-1.7=0.8, |
| 200÷5=40, | 400×20=8000, | 840÷4=210, | 30×50×0=0. |
分析:小数加减法题,根据小数加减法的计算法则进行计算即可;
因数末尾有0的乘法,先把0前面的数相乘,再看因数的末尾有几个0,就在乘得的积的末尾添写几个0.
点评:本题考查了学生的基本计算能力,根据数据和运算符号的特点,直接口算即可.
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