北师大版数学七年级下册计算题大全 (75)
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2) -5x 2y 2(3x 2yz -5y 2
z) a)(21
a
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q)
3
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(-4πr3h+3πr h2)÷(
5
1
πrh)
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(-a2b)4
2)
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z)
a)(
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(8x-7y)(x+
2y)
q)
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2)
(-4πr 2h +6πr h 2
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ab 2)3
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(-a 2b)3
2)
-5x 2y 3(3x 2yz +2y 2z)
a)(81
a
(x -4y)(x (-3a -3b)(8a +4b) (7x -8y)(x +3y)
3x
a 4x 3
ax 2) (-4πr 3h +2πr h 3
)÷(21πrh)
(2a 2
ab 2)3
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32z 2)
(8x)3•y2÷(14x2y3)
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2x
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ax 2) (-3πr 2h +6πr h 3
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(-a 2b)4÷(-1/1ab 2) -4x 3y 3(9x 2yz +5y 2z)
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z) a)(81
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2y)
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ab 2)
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ab2)
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4x
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ax 2) (-3πr 2h +6πr h 2
)÷(41πrh)