题目内容
0.2×0.4= | 0.24÷0.3= | 0.5+1.5÷1.5-0.5= |
8÷5= | 0.43×0.3= | 3.6÷0.01= |
0.12+0.8= | 0.8×1.25= | 5.6÷0.07= |
4.5+3.5×3= | 0.25×7.5×4= | 0.45÷0.5= |
分析:根据小数的加减乘除及四则混合运算进行计算即可.0.5+1.5÷1.5-0.5应用加法交换律,0.25×7.5×4应用乘法交换律,计算即可得解.
解答:解:
0.2×0.4=0.08 | 0.24÷0.3=0.8 | 0.5+1.5÷1.5-0.5=1 |
8÷5=1.6 | 0.43×0.3=0.129 | 3.6÷0.01=360 |
0.12+0.8=0.92 | 0.8×1.25=1 | 5.6÷0.07=80 |
4.5+3.5×3=15 | 0.25×7.5×4=7.5 | 0.45÷0.5=0.9 |
点评:口算题目,要求快速准确,能用简便方法的要用简便方法.
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