78.8-36-780%简便运算
问题描述:
78.8-36-780%简便运算
答
78.8-36-780%
=78.8-36-7.8
=35
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答
78.8-36-780%
=78.8-36-7.8
=(71+7.8)-36-7.8
=71-36+(7.8-7.8)
=35
答
78.8-36-780%
=78.8-36-7.8
=78+0.8-36-7-0.8
=(78-36-7)+(0.8-0.8)
=35
答
∵780%=7.8
∴78.8-36-7.8
=71-36
=35
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