以下算式的简便计算.(无简便就不用.)620+2730÷36×123-2÷3-1/6×1114/5÷7×5/14÷7/12(5÷5/6-5/6÷5)-1又3/10

问题描述:

以下算式的简便计算.
(无简便就不用.)
620+2730÷36×12
3-2÷3-1/6×11
14/5÷7×5/14÷7/12
(5÷5/6-5/6÷5)-1又3/10

620+2730÷36×12
=620+910*3*12÷36
=620+910
=1530
3-2÷3-1/6×11
=3-4/6-11/6
=3-5/2
=1/2
14/5÷7×5/14÷7/12
=2/5×5/14÷7/12
=1/7×12/7
=12/49
(5÷5/6-5/6÷5)-1又3/10
=(6-1/6)-1-3/10
=5-14/30
=4又8/15