(3/4-1/5÷4)×5/14 简便计算,

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(3/4-1/5÷4)×5/14简便计算,(3/4-1/5÷4)×5/14简便计算,(3/4-1/5÷4)×5/14简便计算,原式=(3/4-1/5*1/4)*5/14=[3/4-(1/4-1/5)]

(3/4-1/5÷4)×5/14 简便计算,
(3/4-1/5÷4)×5/14 简便计算,

(3/4-1/5÷4)×5/14 简便计算,
原式=(3/4-1/5*1/4)*5/14
=[3/4-(1/4-1/5)]*5/14
=(3/4-1/4+1/5)*5/14
=(1/2+1/5)*5/14
=7/10*5/14
=1/4

4/1

(3/4-1/5÷4)×5/14
=(3-1/5)÷4×5/14
=(14/5) ÷4×5/14
=(14/5) ×5/14÷4
=1÷4
1/4