1.25乘49+1.2用简便方法计算

1.25乘49+1.2用简便方法计算
2024-11-22 06:52:57
推荐回答(2个)
回答1:

1.25乘49+1.2
=1.25乘49+1.25-0.05
=1.25*(49+1)-0.05
=62.5-0.05
=62.45

回答2:

1.25X(50-1)+1.2
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