去括号计算题100道

农俗燕1504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+... -
杜采叛18265855328 ______[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...

农俗燕1504谁能帮我出20道去括号,合并同类项的数学题出20道去括号,合并同类项的数学题(至少两个括号) -
杜采叛18265855328 ______[答案] 3.3ab-4ab+8ab-7ab+ab=______. 4.7x-(5x-5y)-y=______. 5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 6.-7x2+6x+13x2-4x-5x2=______. 7.2y+(-2y+5)-(3y+2)=______. 11.(2x2-3xy+4y2)+(x2+2xy-3y2)=_____...

农俗燕1504找50道关于去括号合并同类项的计算题,急急急急急急!!!!!!!
杜采叛18265855328 ______ 例1、合并同类项 (1)(3x-5y)-(6x 7y) (9x-2y) (2)2a-[3b-5a-(3a-5b)] (3)(6m2n-5mn2... =6x-14y (2)2a-[3b-5a-(3a-5b)] (应按小括号,中括号,大括号的顺序逐层去括号) =2...

农俗燕1504关于初一上册去括号,合并同类项数学题(计算题)要30道 -
杜采叛18265855328 ______[答案] 3.3ab-4ab+8ab-7ab+ab=______. 4.7x-(5x-5y)-y=______. 5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______. 6.-7x2+6x+13x2-4x-5x2=______. 7.2y+(-2y+5)-(3y+2)=______. 11.(2x2-3xy+4y2)+(x2+2xy-3y2)=_____...

农俗燕1504五道去括号的计算题,1. - 4( - a - b) 2.4(x² - 2xy) 3. - 3分之1(6x - 4y²) 4.5分之1(a - 5) 5. - 2(ab²+3a²b) -
杜采叛18265855328 ______[答案] -4(-a-b) =4a+4b;2.4(x²-2xy) =4x²-8xy;3.-3分之1(6x-4y²) =-2x+4y²/3;4.5分之1(a-5) =a/5-1;5.-2(ab²+3a²b)=-2ab²-6a²b;很高兴为您解答,skyhunter002为您答疑...

农俗燕1504去掉括号的运算 , - 7.2 - 0.9 - 5.6+8.7 - 1+2 - 3 - 4+5 - 3 - 4+19 - 11某同学将零花钱存起来,存折中有80元 第一次取出20元 第二次取出30元 第三次存入100元 第四次取... -
杜采叛18265855328 ______[答案] 掉括号的运算 ,不会啊(负的归在一起-7.2-0.9-5.6+8.7=-(7.2+0.9+5.6)+8.7=-13.7+8.7=-5-1+2-3-4+5=-(1+3+4)+(2+5)=-8+7=-1-3-4+19-11=-(3+4+11)+19=-18+19=1某同学将零花钱存起来,存折中有80元 第一次取出20...

农俗燕150450道合并同类项的计算题1、要50道合并同类项的题 -
杜采叛18265855328 ______[答案] (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)] (应按小括号,中括号,大括号的...

农俗燕1504去括号练习题 -
杜采叛18265855328 ______ -(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

农俗燕1504数学计算题2道去括号的2(X - 2) - 3(4X - 1)=9(1 - X)(过程写详细)3X - 2 - 8*(4分之1X - 1)= - 5(过程写详细) -
杜采叛18265855328 ______[答案] 2(X-2)-3(4X-1)=9(1-X)(过程写详细) 2x-4-12x+3=9-9x 2x-12x+9x=9+4-3 -x=10 x=-10 3X-2-8*(4分之1X-1)=-5(过程写详细) 3x-2x+8=-5 x=-5-8 x=-13

农俗燕1504几道去括号的题 -
杜采叛18265855328 ______ (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)