Question

【数学】小学数学题。简便运算。能简便的要简便。五小题。如下。要过程

3/5×(5/12÷3/4) 5/6+7/12÷1/2 2/3÷[1-(1/3-1/4)] 4÷1.25÷8 5/9×7/13+6/13×5/9

不能简便的告诉我，要过程哦。

Answer 1

3/5×(5/12÷3/4)
=(3/5)×(5/12 × 4/3)
=(3/5)×(5/9)
=1/3
.
5/6+7/12÷1/2
=5/6+(7/12)×2
=5/6 + 7/6
=12/6
=2
.
2/3÷[1-(1/3-1/4)]
=(2/3)÷( 1- 1/12)
=(2/3)÷(11/12)
=(2/3)×(12/11)
=8/11
.
4÷1.25÷8
=4÷(1.25×8)
=4÷10
=0.4
.
5/9×7/13+6/13×5/9

=(5/9)×(7/13+6/13)
=5/9

Answer 2

被别人抢了……好不甘心哦