简便运算 （1/27+1/9）×45 要过程
=1/27x45+1/9x45
=5/3+5
=6又3分之2
简便运算9/125×1/32÷25，急!!!
9/125×1/32÷25
=9/125*1/32*1/25
=9/(125*8*4*25)
=9/100000
24+1/13*1/2
=24+1/26
24又1/26
(1/3+1/5)×15
=1/3×15+1/5×15
=5+3
=8
(1/9+1/3)×27
=1/9×27+1/3×27
=3+9
=12
(1/6+1/4)×36
=1/6×36+1/4×36
=6+9
=15
89×7/88
=(88+1)×7/88
=7+7/88
=7又7/88
64.5×1/11+1/11×34又1/2
=64.5×1/11+1/11×34.5
=1/11×（64.5+34.5）
=1/11×99
=9
甲数的3/5等於乙数的2/3，甲数是60，求乙数
设乙数为x;
60×3/5=2/3x
36=2x/3
2x=108
x=54
4/9×2/7+2/7
=2/7x(4/9+1)
=2/7x13/9
=26/63
1/6-3/8×1/6
=1/6x(1-3/8)
=1/6x5/8
=5/48
1/9-6/7×1/9
=1/9x(1-6/7)
=1/9x1/7
=1/63
1-(-5)×（-79/7）-5×79/9
=1-5×79/7-5×79/9
=1-5×79×(1/7+1/9)
=1-395×16/63
=1-6320/63
=-6257/63
23-8/9×37.5%÷1/27 =23-8/9×3/8×27 =23-9 =14
解:原式=33/8
=4又1/8
分析:直接运算最简便。
=(18分之12-18分之4+18分之3)÷2分之1
=18分之11×2
=9分之11