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0×43= 180÷9= 11×30= 630÷7=
3.8-1.2= 1.2+0.5= 0÷270= 540÷9=
40×30= 600÷6= 50×60=
分析:根据整数和小数加减乘除的计算方法进行计算.
解答:解:
0×43=0, 180÷9=20, 11×30=330, 630÷7=90,
3.8-1.2=2.6, 1.2+0.5=1.7, 0÷270=0, 540÷9=60,
40×30=1200, 600÷6=100, 50×60=3000.
点评:口算时,注意运算符号和数据,然后再进一步计算.
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