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简便方法算数(3/5+1/5)+(2/3-12/17)-(1/5+5/17)简便方法怎么算？
题目详情
简便方法算数
(3/5+1/5)+(2/3-12/17)-(1/5+5/17)
简便方法怎么算？
(3/5+1/5)+(2/3-12/17)-(1/5+5/17)
简便方法怎么算？
▼优质解答
答案和解析
（3/5+1/5)+(2/3-12/17)-(1/5+5/17)
=3/5+1/5+2/3-12/17-1/5-5/17
=（3/5-1/5+1/5）+（-12/17-5/17）+2/3
=3/5-1+2/3
=4/15
=3/5+1/5+2/3-12/17-1/5-5/17
=（3/5-1/5+1/5）+（-12/17-5/17）+2/3
=3/5-1+2/3
=4/15
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