去括号练习题

红背花3675 - (2x - 3)去括号题 -
宦盲泄18460867156 ______[答案] =-2x+3

红背花367520道整式的加减的题,去括号一类的比如:(7mn - 5m) - (4mn - 5m)计算题 -
宦盲泄18460867156 ______[答案] 7mn-5m-4mn+5m =3mn 记住括号前是加号,括号里面不变号.前面是减号,里面的加号变减号,减号变加号.

红背花3675去括号练习题 -
宦盲泄18460867156 ______ -(x-6y)-(-7+3y) =-x+6y+7-3y =-x+3y+7 3(2a²-b²)-2(3b²-2a²) =6a²-3b²-6b²+4a² =10a²-9b² (m²-2mn+n²)-(m²+2mn+n²) =m²-2mn+n²-m²-2mn-n² =-4mn -1/2(x+y)-1/4(x-y) =-x/2-y/2-x/4+y/4 =-3x/4-y/4 -3/4(x²-x)+2(x²-x) =(-3/4+2)(x²-x) =5/4(x²-x) =5x²/4-5x²/4 2(x-3x²+1)-3(2x²-x-2) =2x-6x²+2-6x²+3x+6 =-12x²+x+8 =-12*2²+2²+8 =-36

红背花3675去括号练习题化简: - (x - 6y) - ( - 7+3y)3(2a^2 - b^2) - 2(3b^2 - 2a^2)(m^2 - 2mn+n^2) - (m^2+2mn+n^2) - 1/2(x+y) - 1/4(x - y) - 3/4(x^2 - x)+2(x^2 - x)还有化简求值,2(x - 3x^2+... -
宦盲泄18460867156 ______[答案] -(x-6y)-(-7+3y)=-x+6y+7-3y=-x+3y+73(2a²-b²)-2(3b²-2a²)=6a²-3b²-6b²+4a²=10a²-9b²(m²-2mn+n²)-(m²+2mn+n²)=m²-2mn+n²-m²...

红背花3675几道去括号的题 -
宦盲泄18460867156 ______ (1)3X²+2XY-Y²-2(X²-3XY+2Y²) (2)A²-4A+5/2+3(-A²-2A-1) (3)A=3x²-2x-4,B=-2x²+x+1,3A-2B= (4)-2(x²y/4-3xy+xy²-5)-(-3xy²+xy-2-x+4x²y)

红背花3675一元一次方程题(去括号的) -
宦盲泄18460867156 ______[答案] (5x+20+X)*0.5=298 X=96(x+24)*17/6=(x-24)*3 X=840 X*1/80*2+(5+X)*1/80*8=3/4 X=2 3*X+(138-X)*5=540 X=75 (x-36)/(10-8)=(36+36)/(12-10) x=108

红背花3675一道简单的去括号题!!
宦盲泄18460867156 ______ ﹣1/3(7x+6y)-[﹣3/5(4x-5y)] =-7/3x-2y+3/5(4x-5y) =-7/3x-2y+12/5x-3y =(36-35)/15x-5y =1/15x-5y

红背花3675求初一(上)去括号和合并同类项的习题最好是精选的,要附答案,谢谢! -
宦盲泄18460867156 ______[答案] 例1、合并同类项 (1)(3x-5y)-(6x+7y)+(9x-2y) (2)2a-[3b-5a-(3a-5b)] (3)(6m2n-5mn2)-6(m2n-mn2) (1)(3x-5y)-(6x+7y)+(9x-2y) =3x-5y-6x-7y+9x-2y (正确去掉括号) =(3-6+9)x+(-5-7-2)y (合并同类项) =6x-14y (2)2a-[3b-5a-(3a-5b)] (应...

红背花3675去括号数学练习题
宦盲泄18460867156 ______ a-b-cX+bX-3Y+3+2Y-16X

红背花3675关于去括号的练习题 -
宦盲泄18460867156 ______ 看看行不?1. 4x-2(x-3)-3[x-3(4-2x)+8] 2. 8ab-{4a-3[6ab+5(ab+a-b)-7a]-2}