Question

（7/8-7/8×4/5)÷7/6 7/12÷1/6+5/6×2 11÷11/12-11/12÷11 能简便就简便计算 我写过了 对下答案

Answer 1

（7/8-7/8×4/5)÷7/6
=7/8×(1-4/5)×6/7
=3/4×1/5
=3/20

7/12÷1/6+5/6×2
=7/12+5/12
=1

11÷11/12-11/12÷11
=12-1/12
=11又12分之11

追问

7/12÷1/6+5/6×2
=7/12+5/12
=1
我不明白 还有一题18÷(12/5+3/7) 7/12÷1/6+5/6×2
我是这样写的：=7/12×6+5/6×2=7/2+5/3=11/6

追答

18÷(12/5+3/7)
=18÷[3×(4/5+1/7)]
=6÷(28/35+5/35)
=6÷33/35
=70/11

7/12÷1/6+(5/6)×2
=7/2+5/3
=21/6+10/6
=31/6

Answer 2

7/8×(1-4/5)×6/7=7/8×6/7×1/5 7/12×6+5/6×2=7/6+5/6+5/6 12-1/12=11/12
=3/4×1/5 =2+5/6
=3/20 =2又5/6

注意：除以一个数就是乘以这个数的倒数