配套习题- 去括号法则 -【青果学院】

1/5单选题

难度：

1.化简

的最后结果是（）

A
B
C
D

正确答案：Qw==

PGltZyB3aWR0aD05NiBoZWlnaHQ9MjQgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8zRS9GOS9yQkFDSjFUSXRQaUE0R1FUQUFBQ2JHQzNQbGM3OTUucG5nIj49PGltZyB3aWR0aD0xMjEgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMkUvckJBQ0UxVEl0UGl3QWVKMkFBQUNCU2RzcEpjODgyLnBuZyI+LOaVhemAiUPjgII=

2/5单选题

难度：

2.两个多项式的和是5x²-3x+2，其中一个多项式是-x²+3x-4，则另一个多项式是( )。

A
B
C
D

正确答案：QQ==

NXg8c3VwPjI8L3N1cD4tM3grMi3vvIgteDxzdXA+Mjwvc3VwPiszeC0077yJPTxpbWcgd2lkdGg9MzUxIGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzNFL0Y5L3JCQUNKMVRJdFFIeXU5M09BQUFFUHVScVJhdzA1Ni5wbmciPuOAgg==

3/5单选题

难度：

3.化简

所得结果是（）

A	3ab
B	ab
C	-3a²
D	0

正确答案：Qg==

PGltZyB3aWR0aD0yMDQgaGVpZ2h0PTUwIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMkUvckJBQ0UxVEl0UVR5ZTM4U0FBQUZPWW1VWmtnNzU0LnBuZyI+PTxpbWcgd2lkdGg9MjM2IGhlaWdodD00MiBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwLzczLzJFL3JCQUNFMVRJdFFUd2ZuQ1BBQUFEWHk0LXhYTTQ0Mi5wbmciPi7mlYXpgIlC44CC

4/5单选题

难度：

4.已知

，那么

的值为（）

A	80
B	10
C	210
D	40

正确答案：QQ==

PGltZyB3aWR0aD0yMjIgaGVpZ2h0PTMzIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvNzMvMkUvckJBQ0UxVEl0UHZoY0F4dEFBQUU1d2NZMmFzOTI4LnBuZyI+PTxpbWcgd2lkdGg9MjA4IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDIucWluZ2d1by5jb20vRzEvTTAwL0FBLzQzL3JCQUNGRlRJdFB2U3JUdmZBQUFEUVcyc25KZzM3NC5wbmciPkE=

5/5单选题

难度：

5.减去

等于

的代数式是（）

A
B
C
D

正确答案：RA==

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