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4.8+0.8= 2.4×0.6÷2= 4.8×0.5÷1.6=
6.4+3.2= 2.4×0.3÷4= 4.8×0.7÷0.8=
分析:根据小加减乘除的计算方法进行计算.
混合运算只含有乘除法,按照从左向右的顺序进行计算.
解答:解:
4.8+0.8=5.6 2.4×0.6÷2=0.72 4.8×0.5÷1.6=1.5
6.4+3.2=9.6 2.4×0.3÷4=0.18 4.8×0.7÷0.8=4.2
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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