(17/12-3/4-1/4)÷5/12 简便计算

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(17/12-3/4-1/4)÷5/12简便计算(17/12-3/4-1/4)÷5/12简便计算(17/12-3/4-1/4)÷5/12简便计算(17/12-3/4-1/4)÷5/12=[17/12-

(17/12-3/4-1/4)÷5/12 简便计算
(17/12-3/4-1/4)÷5/12 简便计算

(17/12-3/4-1/4)÷5/12 简便计算
(17/12-3/4-1/4)÷5/12
=[17/12-(3/4+1/4)]÷5/12
=(17/12-1)÷5/12
=5/12×12/5
=1

=[(17/12-(3/4+1/4)]÷5/12
=(17/12-1)÷5/12
=5/12÷5/12
=1