48×括号7/12+1/2-1括号
48×括号7/12+1/2-1括号
48×(7/12+1/2-1)
=48×7/12-48×1/2
=4×7-24
=28-24
=4
括号1/12+1/51括号乘括号17×6括号
(1/12+1/51)x(17x6)
=(1/12+1/51)x102
=102x1/12+102x1/51
=17/2+2
=8.5+2
=10.5
谢谢,请采纳
48×括号7/12+24分之5+1/6括号
48×(7/12+5/24+1/6)
=48×7/12+48×5/24+48×1/6
=28+10+8
=46
括号5/12+1/19括号乘12+7/19
括号5/12+1/19括号乘12+7/19
(5/12+1/19)x12+7/19
=5/12x12+1/19x12+7/19
=5+12/19+7/19
=5+(12/19+7/19)
=5+1
=6
7/12-括号1/12-1/2括号等於多少
7/12-(1/12-1/2)
=7/12-1/12+1/2
=6/12+1/2
=1/2+1/2
=1
-36×括号7/12-5/9-1/4括号
-36×括号7/12-5/9-1/4括号
解:采用分配律,
原式=-36x(7/12-5/9-1/4 )
=-36x7/12+36x5/9+36x1/4
=-3x7+4x5+9
=-21+20+9
=-1+9
=8
5/12-减括号里的7/12+1/6括起来乘以1/2用
5/12-(7/12+1/6)*1/2
=5/12-10/12*1/2
=5/12-5/12
=0
2/13-括号7/12-1/12=
2/13-(7/12-1/12)
=2/13-1/2
=4/26-13/26
=-9/26
1/6-括号-1/6-1/9 5/12 7/18括号
1/6-(-1/6-1/9+5/12+7/18)
=1/6+1/6+1/9-5/12-7/18
=(1/6+1/6-5/12)+(1/9-7/18)
=-1/12-5/18
=-13/36
36乘括号1/3-5/81加7/12反括号
36乘括号1/3-5/81加7/12反括号
=36x1/3-36x5/81+36x7/12
=12-20/9+21
=33-2又2/9
=30又7/9