作业帮5.5*4.8-0.45*48简便计算怎么做?
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5.5*4.8-0.45*48简便计算怎么做?
5.5*4.8-0.45*48简便计算怎么做?
5.5*4.8-0.45*48简便计算怎么做?
=5.5×4.8-4.5×4.8
=（5.5-4.5）×4.8
=1×4.8
=4.8
0.55*48+0.45*48
4.8
0.55*48-0.45*48=（0.55-0.45）*48=0.1*48=4.8