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一道分数计算题用简便方法计算3/4x1/5+3/4x2/5+0.75x3/5-3/4
题目详情
一道分数计算题
用简便方法计算
3/4x1/5+3/4x2/5+0.75x3/5-3/4
用简便方法计算
3/4x1/5+3/4x2/5+0.75x3/5-3/4
▼优质解答
答案和解析
3/4x1/5+3/4x2/5+0.75x3/5-3/4
=3/4x1/5+3/4x2/5+3/4x3/5-3/4
=3/4x(1/5+2/5+3/5-1)
=3/4x1/5
=3/20
=3/4x1/5+3/4x2/5+3/4x3/5-3/4
=3/4x(1/5+2/5+3/5-1)
=3/4x1/5
=3/20
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