7.2乘以10.
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7.2乘以10.
7.2乘以10.
7.2乘以10.
7.2×(10.2)
=7.2×(10+0.2)
=7.2×10+7.2×0.2
=72+1.44
=73.44
=7.2*(10+0.2)
=72+1.44
=73.44
7.2*(10+0.2)=7.2*10+7.2*0.2=72+1.44=73.44
7.2*10.2=(8*9*(100+2))/100=73.44这样还好吧。。。
=7.2×(10+0.2)
=7.2×10+7.2×0.2
=72+1.44
=73.44
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