8/15-7/15×5/7+7/15简便计算
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8/15-7/15×5/7+7/15
咨询记录 · 回答于2022-10-09
8/15-7/15×5/7+7/15简便计算
8/15-7/15×5/7+7/15
=1/15x(8一7x5/7+7)
=1/15x(8-5+7)
=1/15x10
=1/3
23/25×16/17+16/25×2/17简便计算
23/25×16/17+16/25×2/17简便计算
23/25×16/17+16/25×2/17
=1/17x(23/25x16+16/25x2)
=1/17x(23x16/25+16x2/25)
=1/17x(23x16十16x2)/25
=16/17x25/25
=16/17x1
=16/17