(3/7+5/14+1/2)*28 简便运算

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(3/7+5/14+1/2)*28 简便运算

(3/7+5/14+1/2)*28
=3/7*28+5/14*28+1/2*28
=12+10+14
=36

(3/7+5/14+1/2)*28
=3/7*28+5/14*28+1/2*28
=12+10+14
=36