(七分之三减三十四分之一)乘七减三十四分之二十七怎么简便算?

问题描述:

(七分之三减三十四分之一)乘七减三十四分之二十七怎么简便算?

(3/7-1/34)x7-27/34
=3/7x7-1/34x7-27/34
=3-7/34-27/34
=3-1
=2

(3/7-1/34)*7-27/34
=3/7*7-1/34*7-27/34
=3-7/34-27/34
=3-(7/34+27/34)
=3-1
=2

(七分之三减三十四分之一)乘七减三十四分之二十七
=3/7x7-1/34x7-27/34
=3-(7/34+27/34)
=3-1
=2

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