七年级数学上册计算题专项练习 250.docx
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七年级数学上册计算题专项练习250
8b2-(5a2-b2)+3b2
9x+(3x-3)-(-4)
-(ab-2a2)+(6ab-4a2)
6a2+(ab-4a2)-7ab
-4(b-2)+4(-b+2)
(x2-y)+(x-y2)+(x2-y2)
-(-x+3y)+(x-3y)
(3s-3)+4(s2+s-2)
-2(a2b-ab2+a3)-(-4a2b-2ab2)
-(3mn-5m2-2n2)+(-mn-2m2+)
(3a3+a2b-1)-(a2b+5)
-3(x3-y3-)-2(x3+y3+)
6b2-(2a2+3b2)-b2
8x+(4x-9)-(+4)
-3(ab+2a2)-(4ab-a2)
5a2+(ab-a2)-3ab
-4(b+2)-3(-b+3)
(x2-y)+(x-y2)+(x2+y2)
-(-x+2y)+(x-3y)
(6s-2)+2(s2-s+4)
-3(a2b+ab2-a3)+(-2a2b+2ab2)
-(2mn-3m2+2n2)-(-mn-5m2-)
(3a3+a2b+3)+(a2b-3)
-2(x3-y3+)-2(x3-y3+)
9b2-(a2-b2)+5b2
7x+(x-6)-(-3)
-4(ab+2a2)+(2ab-3a2)
5a2-(3ab-5a2)-ab
-(b-1)-5(-b+3)
(x2-y)-(x-y2)+(x2-y2)
-(-x+4y)+(x-3y)
(3s+3)+4(s2+s-3)
-2(a2b+ab2+a3)+(-4a2b-4ab2)
-(3mn+4m2-3n2)+(-mn+4m2-)
(a3-a2b-2)-(a2b-1)
-4(x3-y3-)+2(x3-y3-)
3b2-(5a2+2b2)-3b2
4x+(3x-9)-(-4)
-2(ab-5a2)+(5ab-3a2)
a2-(3ab-a2)-4ab
-(b+4)-5(-b+3)
(x2-y)-(x-y2)-(x2-y2)
-(-x+2y)-(x-3y)
(5s-1)+3(s2-s-4)
-3(a2b-ab2+a3)+(-3a2b-4ab2)
-(2mn-2m2-5n2)-(-mn-5m2+)
(a3-a2b-5)+(a2b-5)
-2(x3-y3+)-4(x3-y3-)
9b2-(5a2+6b2)-4b2
6x+(2x-5)-(-5)
-2(ab-5a2)+(6ab-2a2)
4a2+(ab-4a2)-ab
-4(b+2)+3(-b-3)
(x2-y)+(x-y2)+(x2-y2)
-(-x+2y)-(x-3y)
(2s+3)+2(s2+s+4)
-3(a2b-ab2-a3)+(-3a2b-2ab2)
-(4mn+5m2-5n2)-(-mn+2m2-)
(4a3-a2b+3)-(a2b+2)
-3(x3-y3-)-4(x3+y3+)
4b2-(2a2-4b2)+2b2
7x+(5x-7)-(+5)
-3(ab-4a2)-(4ab-a2)
2a2-(3ab-a2)-3ab
-2(b+4)-4(-b-3)
(x2-y)+(x-y2)+(x2-y2)
-(-x+3y)-(x-3y)
(5s-4)+4(s2+s+5)
-2(a2b+ab2+a3)+(-3a2b+2ab2)
-(5mn-4m2+5n2)+(-mn+2m2-)
(3a3+a2b-3)-(a2b+5)
-3(x3-y3+)-4(x3-y3+)
7b2-(2a2+4b2)-b2
9x+(2x-3)-(+1)
-4(ab-4a2)+(5ab-4a2)
4a2-(ab+2a2)-ab
-3(b+2)-4(-b+4)
(x2-y)+(x-y2)-(x2+y2)
-(-x+2y)-(x-y)
(3s-4)-3(s2+s-5)
-(a2b+ab2+a3)-(-3a2b+4ab2)
-(5mn+5m2-3n2)-(-mn-4m2+)
(3a3+a2b+2)-(a2b-5)
-3(x3+y3+)-4(x3-y3-)