七年级数学上册计算题专项练习 246.docx
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七年级数学上册计算题专项练习246
9b2-(4a2-4b2)-5b2
2x+(4x-4)-(
-4)
-2(ab+5a2)+(3ab-a2)
a2-
(ab-5a2)-7ab
-(b-4)-2(-b+3)
(x2-y)+
(x-y2)-
(x2+y2)
-(-
x+3y)+(
x-3y)
(3s+1)-3(s2-s+4)
-2(a2b+
ab2-
a3)-(-2a2b+4ab2)
-
(5mn-4m2+2n2)-(-
mn-4m2+
)
(a3+
a2b+3)-
(a2b-2)
-4(
x3+
y3+
)+3(
x3+
y3-
)
3b2-(2a2+5b2)-4b2
8x+(2x-8)-(
+3)
-5(ab-a2)+(6ab-a2)
4a2-
(3ab+a2)-ab
-3(b-3)-4(-b-3)
(x2-y)-
(x-y2)+
(x2+y2)
-(-
x+3y)-(
x-2y)
(2s+2)-2(s2+s-2)
-3(a2b+
ab2+
a3)-(-3a2b-2ab2)
-
(2mn-5m2+4n2)+(-mn+3m2-
)
(4a3+
a2b-1)-
(a2b-4)
-4(
x3+
y3+
)-2(
x3+
y3+
)
4b2-(3a2-5b2)-6b2
5x+(3x-4)-(
-1)
-5(ab-a2)+(6ab-a2)
6a2-
(2ab-6a2)-8ab
-3(b+1)-2(-b+3)
(x2-y)+
(x-y2)-
(x2-y2)
-(-
x+y)+(
x-3y)
(4s+1)+3(s2-s+4)
-2(a2b+
ab2-
a3)-(-2a2b-3ab2)
-
(3mn-5m2-5n2)-(-
mn-2m2-
)
(a3+
a2b-2)-
(a2b-5)
-4(
x3-
y3+
)+2(
x3-
y3-
)
8b2-(4a2+b2)-b2
8x+(2x-7)-(
+1)
-(ab+a2)-(6ab-a2)
3a2+
(3ab+3a2)-2ab
-3(b-4)-3(-b+2)
(x2-y)+
(x-y2)-
(x2-y2)
-(-
x+2y)-(
x-3y)
(6s-4)-2(s2-s+5)
-(a2b-
ab2-
a3)+(-2a2b-2ab2)
-
(5mn+2m2+3n2)+(-
mn+2m2+
)
(4a3+
a2b+5)-
(a2b-3)
-2(
x3+
y3-
)+4(
x3+
y3-
)
b2-(a2+b2)+3b2
2x+(2x-6)-(
-1)
-(ab-3a2)-(4ab-a2)
5a2+
(ab-6a2)-3ab
-2(b+3)+5(-b+2)
(x2-y)-
(x-y2)+
(x2+y2)
-(-
x+2y)-(
x-4y)
(2s+1)-4(s2-s+3)
-2(a2b-
ab2-
a3)+(-2a2b+4ab2)
-
(2mn+3m2+2n2)+(-
mn+5m2-
)
(a3+
a2b-5)-
(a2b+4)
-4(
x3-
y3-
)+2(
x3-
y3-
)
7b2-(5a2+5b2)+b2
6x+(3x-3)-(
+4)
-2(ab-3a2)-(4ab-a2)
a2+
(2ab+6a2)-3ab
-3(b+2)+4(-b-3)
(x2-y)-
(x-y2)+
(x2+y2)
-(-
x+3y)-(
x-3y)
(4s-2)-2(s2-s+3)
-4(a2b-
ab2-
a3)-(-2a2b-4ab2)
-
(5mn-2m2+4n2)-(-mn-3m2+
)
(4a3+
a2b-1)+
(a2b+2)
-3(
x3+
y3-
)+3(
x3-
y3-
)
8b2-(2a2-6b2)-4b2
8x+(2x-3)-(
-5)
-4(ab-4a2)+(2ab-4a2)
2a2+
(ab-a2)-7ab
-4(b-3)+2(-b+2)
(x2-y)-
(x-y2)-
(x2+y2)
-(-
x+y)-(
x-4y)
(6s-1)-4(s2+s+2)
-(a2b-
ab2+
a3)+(-4a2b-3ab2)
-
(2mn+3m2-2n2)+(-mn+4m2+
)
(2a3-
a2b+4)-
(a2b-4)
-4(
x3-
y3-
)+4(
x3-
y3-
)