七年级数学下册计算题 199.docx
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七年级数学下册计算题199
-
(3mn-4m2+2n2)+(+
mn+7m2-
n2)
(a3+
a2b+8)+
(a2b-2)
-5(
x3-
y3+
)-4(
x3-
y3+
)
-(-
x+2y)-(
x-3y)
(6s-8)-2(s2+s-7)
-6(a2b-
ab2+
ab2+
a3)-(-5a2b+3ab2)
-
(4mn-2m2-3n2)+(+
mn+5m2-
n2)
(a3+
a2b+3)-
(a2b-3)
-2(
x3-
y3+
)+5(
x3-
y3+
)
-(-
x+8y)-(
x-6y)
(6s-3)-9(s2-s+3)
-6(a2b-
ab2+
ab2-
a3)+(-4a2b+3ab2)
-
(6mn-2m2-4n2)-(-
mn+2m2-
n2)
(a3+
a2b+7)-
(a2b-9)
-6(
x3-
y3+
)-2(
x3-
y3+
)
-(-
x+8y)+(
x-3y)
(6s+8)-2(s2-s-6)
-5(a2b-
ab2+
ab2-
a3)+(-6a2b+8ab2)
-
(3mn-3m2-2n2)-(+
mn+4m2+
n2)
(a3+
a2b+1)+
(a2b-3)
-6(
x3-
y3+
)+3(
x3-
y3+
)
-(-
x+7y)+(
x-2y)
(4s+1)-3(s2+s-9)
-9(a2b-
ab2+
ab2+
a3)+(-3a2b+4ab2)
-
(6mn-3m2+3n2)-(+
mn+3m2+
n2)
(a3+
a2b+3)+
(a2b-9)
-5(
x3-
y3+
)+3(
x3-
y3+
)
-(-
x+9y)+(
x-3y)
(6s-8)-7(s2+s-2)
-4(a2b-
ab2+
ab2+
a3)-(-8a2b+4ab2)
-
(5mn-3m2+3n2)-(+
mn+5m2-
n2)
(a3+
a2b+6)+
(a2b-6)
-5(
x3-
y3+
)-6(
x3-
y3+
)
-(-
x+2y)-(
x-9y)
(6s+5)-8(s2+s-2)
-4(a2b-
ab2+
ab2-
a3)+(-8a2b+6ab2)
-
(5mn-4m2-4n2)-(-
mn+6m2-
n2)
(a3+
a2b+5)-
(a2b-8)
-4(
x3-
y3+
)-6(
x3-
y3+
)
-(-
x+2y)+(
x-4y)
(3s-6)-5(s2+s-3)
-3(a2b-
ab2+
ab2-
a3)+(-7a2b+2ab2)
-
(3mn-3m2+2n2)+(+
mn+4m2+
n2)
(a3+
a2b+5)+
(a2b-8)
-2(
x3-
y3+
)+6(
x3-
y3+
)
-(-
x+2y)+(
x-10y)
(9s+3)-7(s2-s+6)
-6(a2b-
ab2+
ab2+
a3)+(-9a2b+2ab2)
-
(4mn-4m2+3n2)-(-
mn+3m2+
n2)
(a3+
a2b+4)-
(a2b-9)
-2(
x3-
y3+
)-6(
x3-
y3+
)
-(-
x+10y)+(
x-9y)
(6s+2)-4(s2-s-9)
-3(a2b-
ab2+
ab2+
a3)-(-9a2b+3ab2)
-
(3mn-4m2+2n2)-(+
mn+3m2+
n2)