1.25×99+1.25×10+1.25用简便计算怎么做？

Question

如题所述

Answer 1

1.25×99+1.25×10+1.25
＝1.25×（99+10+1）
＝1.25×110
＝137.5
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Answer 2

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Answer 3

=1.25x（99+1）+12.5
=1.25x100+12.5
=125+12.5
=137.5
,,,

Answer 4

=1.25*（99+1）+12.5
=1.25*100+12.5
=125+12.5
=137.5
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