七年级数学上册计算题专项练习 207.docx
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七年级数学上册计算题专项练习207
7b2-(5a2-4b2)+3b2
7x+(x-7)-(
-1)
-3(ab+3a2)-(5ab-4a2)
5a2-
(ab-3a2)-ab
-2(b+3)+2(-b-4)
(x2-y)-
(x-y2)+
(x2+y2)
-(-
x+2y)-(
x-y)
(5s-4)+4(s2-s-5)
-2(a2b+
ab2+
a3)+(-2a2b-2ab2)
-
(3mn+4m2+4n2)+(-
mn-2m2+
)
(4a3-
a2b+1)-
(a2b+3)
-4(
x3-
y3+
)+4(
x3+
y3-
)
5b2-(2a2+2b2)-2b2
8x+(3x-8)-(
-5)
-4(ab+3a2)-(3ab-4a2)
4a2-
(ab-2a2)-5ab
-4(b-3)+3(-b+2)
(x2-y)-
(x-y2)-
(x2+y2)
-(-
x+y)+(
x-4y)
(3s-1)+2(s2+s+2)
-(a2b+
ab2-
a3)+(-3a2b-3ab2)
-
(3mn+5m2+5n2)+(-mn+4m2+
)
(4a3-
a2b+2)-
(a2b+4)
-2(
x3-
y3+
)+4(
x3+
y3-
)
7b2-(2a2-4b2)-5b2
6x+(x-9)-(
+4)
-3(ab-a2)-(3ab-2a2)
2a2+
(3ab-4a2)-8ab
-2(b+2)+5(-b+4)
(x2-y)+
(x-y2)-
(x2-y2)
-(-
x+3y)-(
x-2y)
(6s+1)+2(s2+s+4)
-2(a2b-
ab2+
a3)+(-3a2b+2ab2)
-
(3mn-3m2-4n2)-(-mn-4m2+
)
(a3-
a2b+2)+
(a2b+1)
-4(
x3-
y3-
)+4(
x3+
y3-
)
3b2-(3a2+b2)+b2
7x+(3x-5)-(
-5)
-2(ab+2a2)-(6ab-3a2)
4a2-
(2ab+5a2)-5ab
-3(b-4)-3(-b+3)
(x2-y)+
(x-y2)+
(x2-y2)
-(-
x+4y)+(
x-3y)
(4s+1)+4(s2+s-4)
-4(a2b-
ab2+
a3)-(-4a2b+2ab2)
-
(3mn+2m2-5n2)+(-
mn-5m2+
)
(4a3-
a2b+4)-
(a2b-1)
-4(
x3+
y3+
)-4(
x3+
y3+
)
4b2-(5a2-2b2)-b2
9x+(5x-7)-(
+4)
-4(ab-5a2)-(5ab-4a2)
3a2+
(3ab+3a2)-4ab
-4(b+3)-3(-b+3)
(x2-y)+
(x-y2)+
(x2+y2)
-(-
x+3y)+(
x-3y)
(3s+3)+4(s2-s+5)
-3(a2b+
ab2-
a3)+(-2a2b-4ab2)
-
(2mn-5m2+2n2)-(-mn-2m2+
)
(3a3-
a2b-1)+
(a2b-3)
-4(
x3+
y3-
)-4(
x3+
y3-
)
9b2-(a2+5b2)+b2
5x+(5x-3)-(
-3)
-2(ab+3a2)+(5ab-4a2)
4a2+
(4ab-3a2)-4ab
-3(b+3)-3(-b+3)
(x2-y)+
(x-y2)+
(x2+y2)
-(-
x+2y)+(
x-2y)
(4s-2)-2(s2+s+4)
-(a2b-
ab2+
a3)+(-2a2b-3ab2)
-
(5mn+4m2+4n2)-(-mn-4m2+
)
(3a3-
a2b+1)-
(a2b+5)
-2(
x3-
y3+
)-3(
x3-
y3+
)
5b2-(a2-3b2)-4b2
8x+(5x-2)-(
-2)
-3(ab+2a2)-(4ab-2a2)
a2+
(2ab-5a2)-2ab
-(b-3)+3(-b-4)
(x2-y)-
(x-y2)+
(x2+y2)
-(-
x+3y)+(
x-4y)
(4s-3)+3(s2-s-2)
-4(a2b-
ab2-
a3)-(-3a2b-4ab2)
-
(4mn+3m2-5n2)-(-
mn-3m2-
)
(4a3-
a2b+4)+
(a2b+6)
-4(
x3+
y3-
)+2(
x3-
y3-
)