5/6【5/6(6/5x-1)-2】=x-3简便运算
5/6【5/6(6/5x-1)-2】=x-3简便运算
5/6【5/6(6/5x-1)-2】=x-3
5/6【x-5/6-2】=x-3
5/6【x-17/6】=x-3
5/6x-85/36=x-3
1/6x=23/36
x=23/6
5/6[6/5(2/3x-1)-2]=x-3 简便算法
5/6[6/5(2/3x-1)-2]=x-3
(2/3x-1)-5/3=x-3
2/3x-8/3=x-3
1/3x=1/3
x=1
5/6x12÷5/6x12简便运算
5/6x12÷5/6x12简便运算
5/6x12÷5/6x12
=5/6÷5/6*12*12
=1*144
=144
5/6[6/5(2/3x-1)-2]=x-8简便运算 1-1/5(x- 10-2x/3)=x/2-1/3(3x- 3-6x/2)
5/6[6/5(2/3x-1)-2]=x-8
5/8*6/5*(2/3x-1)-5/3=x-8
2/3x-8/3=x-8
1/3x=16/3
x=16
1-1/5(x- 10-2x/3)=x/2-1/3(3x- 3-6x/2)
1-x/5-2-2x/15=x/2-x+1+x
-1-x/3=-x/2+1
x/2-x/3=2
x/6=2
x=12
3又5/3X25又5/2+39.9X6又5/2简便运算
三又五分之三乘二十五又五分之二加37.9乘六又五分之二
=3又3/5×25又2/5+37.9×6又2/5
=3.6×(19+6.4)+37.9×6.4
=3.6×6.4+3.6×19+37.9×6.4
=6.4×(3.6+37.9)+3.6×(20-1)
=6.4×41.5+3.6×(20-1)
=6.4×(40+1+0.5)+3.6×(20-1)
=256+6.4+3.2+72-3.6
=256+72+6.4+3.2-3.6
=328+9.6-3.6
=328+6
=334
5/6x69_1/6x45简便运算
5/6x69-1/6x45
=5/6x69-5/6x9
=5/6x(69-9)
=5/6x60
=50
5/12-1/6+2/3简便运算
5/12-1/6+2/3……
=5/12-2/12+8/12
=11/12
3/4+4/9-3/4+4/9
=(3/4-3/4)+(4/9+4/9)……交换位置。同分母相加减。
=8/9
5/11-(6/7-6/11) 用简便运算
5/11-(6/7-6/11) 用简便运算
=5/11+6/11-6/7
=1-6/7
=1/7
简便运算:(5/14+1/2)÷6/7 348×101-348
第一问,把(5/14+1/2)÷6/7改为(5/14+1/2)×7/6,然后把括号里面的的加一下,再乘就可以了。
第二问,吧348提出来,成 348×(101-1)得到34800
(5/6+3/4)x3/38简便运算
(5/6+3/4)x3/38
=(10/12+9/12)x3/38
=19/12x3/38
=1/8
这题没有简便方法
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