小学去括号计算题100道

勾利朋2521求100道七年级去括号练习题 -
弘爽桂19532021417 ______[答案] 一、选择题 1.下列方程是一元一次方程的是( )A、x+2y=9 B.x2-3x=1 C.D.2.方程x/2-x/3+5/3=1x,去分母得( )A.3x-2x+10=1 B.3x-2x-10=1 C.3x-2x-10=6 D.3x-2x+10=63.如果关于x的方程(m+3)x=6是一元一次方程,则m...

勾利朋2521求20道原创七年级上册数学去括号习题,要有答案! -
弘爽桂19532021417 ______ (1)(3x-5y)-(6x+7y)+(9x-2y) (2)2a-[3b-5a-(3a-5b)] (3)(6m2n-5mn2)-6(m2n-mn2) 解:(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...

勾利朋2521数学计算题2道去括号的 -
弘爽桂19532021417 ______ 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

勾利朋2521去括号练习题 -
弘爽桂19532021417 ______ -(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

勾利朋2521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) -
弘爽桂19532021417 ______[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

勾利朋2521四道去括号的题, - 4(xy - 2分之1)2分之1(a² - b² - 1) - 2(3a - 2ab+4b²)4(x - x² - 2分之1) -
弘爽桂19532021417 ______[答案] -4(xy-2分之1) = -4xy+2 2分之1(a²-b²-1) = (1/2)a²-(1/2)b²-(1/2) -2(3a-2ab+4b²) = -6a+4ab-8b² 4(x-x²-2分之1) = 4x-4x²-2

勾利朋2521五道去括号的计算题,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) -
弘爽桂19532021417 ______[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...

勾利朋2521去括号数学练习题
弘爽桂19532021417 ______ a-b-cX+bX-3Y+3+2Y-16X

勾利朋2521几道去括号的题 -
弘爽桂19532021417 ______ (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)

勾利朋2521关于去括号的练习题 -
弘爽桂19532021417 ______ 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}