12.4.4 1-{1/6 (3/4-7/12)}怎么简便计算

1-{1/6 (3/4-7/12)}怎么简便计算  

1-{1/6 (3/4-7/12)}怎么简便计算

1-{1/6+(3/4-7/12)}
=1-（2/12+9/12-7/12）
=1-4/12
=1-1/3
=2/3

1/6+7/12除以(3/4-1/6)简便计算

1/6+7/12除以(3/4-1/6)简便计算
1/6+7/12除以(3/4-1/6)
=1/6+7/12÷7/12
=1/6+1
=7/6

简便计算(-3/4+5/6+7/12)×16÷(-1/3)

先把后两项处理一下变为算(-3/4+5/6+7/12)×16÷(-1/3)=(-3/4+5/6+7/12)×（—48）在用分配法
=36-40-28=-32

（6一1/4一3/4）÷1/简便计算怎么算？

（6-1/4-3/4）÷1
=(6-1)÷1
=5÷1
=5

12/7*1/9*3/7 简便计算

12/7x1/9x3/7
=12/7x1/21
=4/49
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3/8x(7/6一1/4)÷1/2简便计算

没法简算啊：
3/8x(7/6一1/4)÷1/2
=3/8x11/12÷1/2
=11/32×2
=11/16

1/6 3/4 3/8怎样简便计算

1/6 3/4 3/8怎样简便计算
1/6 3/4 3/8
=4/24+8/24+9/24
=(4+8+9)/24
=21/24
=7/8

简便计算40×(3/4-7/20)

40×(3/4-7/20)
=40×3/4-40×7/20
=30-14
=16

4/7除1/6+4/7乘3/2简便计算

4/7除1/6等于4/7乘以6，提取公因式得4/7*(6+3/2)结果30/7

12x(3/4一1/6一1/3)请问怎么简便计算

12x(3/4一1/6一1/3)
=12X3/4-12X1/6-12X1/3
=4X4-2-4
=16-6
=10