(3/7-1/34)×7-27/34简便

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(3/7-1/34)×7-27/34简便

(3/7-1/34)×7-27/34简便
(3/7-1/34)×7-27/34简便

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

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

(3/7-1/34)×7-27/34
=3/7*7-7/34-27/34
=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

上式=3-7/34-27/34=3-(7/34+27/34)=3-1=2

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