0.28乘100.5怎么简便

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0.28乘100.5怎么简便
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0.28乘100.5怎么简便
0.28乘100.5怎么简便

0.28乘100.5怎么简便
0.28×100.5
=0.28×(100+0.5)
=0.28×100+0.28×0.5
=28+0.14
=28.14

0.28*100.5
=0.28*(100+0.5)
=0.28*100+0.28*0.5
=28+0.14
=28.14