有理数乘法,7道1.25x(-1 /1/7)x(-3.2)x(-7/8) (-12)x(-1 1/7)x(-3.2)x(
1个回答
1.-4.5
2.43.2
3.-30
4.-1/3
5.0.1
6.7
7.-338
8.-239
相关问题
几道简便运算计算题.1、6x(7+1/7+7+1/7)2、1/8x(1/25x4)x253、(3/4+2/3)x12全部
-1/3(6-5x)=8x-2 / 2=2x+3 / 5x+1 /2 - x-1 / 4 =12/7(3x+7)=2 -
1/(x^2+7x)-1/(x^2+7x+6)+1/(x^2+7x+18)-1/(x^2+7x+12)=0
用线性代数解x1+3x2+5x3+7x4 =12,3x1+5x2+7x3+x4=0,5x1+7x2+x3+3x4=1,7
解方程:1.6*0.7-0.12x=1 2.3x+7.7x-5=2.8
(1)(-12.5)x(-6/7)x(-4) (2)(-1/2)x(-2/3)x(-1.25)x(-1又1/3)x(-1
几道初二的分式方程!(1) x+1/x-2加上x+2/x-1=2(2) x-8/x-7减去x/7-x=8(3)x/2x-
(1)x²+7x+10 (2)x²-2x-8 (3)y²-7y+12 (4)x²
2道分式方程1、(x+3)/(x+7)+(x+7)/(x-3)=2===2、(6x-2)/(2x-1)-(6x-3)/(
解下列方程.(1)2(x-3)-3(x-5)=7(x-1);(2)7x?12(53x?12)=8?23(6x?9);(3