配套习题- 整式乘除混合运算的易错点 -【青果学院】

1/5单选题

难度：

1.下列计算正确的是（）

A	a²+a²=a⁴
B	2a-a=2
C	（ab）²=a²b²
D	（a²）³=a⁵

正确答案：Qw==

6Kej77yaQeOAgWE8c3VwPjI8L3N1cD4rYTxzdXA+Mjwvc3VwPj0yYTxzdXA+Mjwvc3VwPu+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5C44CBMmEtYT1h77yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPkPjgIHvvIhhYu+8iTxzdXA+Mjwvc3VwPj1hPHN1cD4yPC9zdXA+YjxzdXA+Mjwvc3VwPu+8jOaVheacrOmAiemhueato+ehru+8mzxicj5E44CB77yIYTxzdXA+Mjwvc3VwPu+8iTxzdXA+Mzwvc3VwPj1hPHN1cD42PC9zdXA+77yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPuaVhemAie+8mkMuIA==

2/5单选题

难度：

2.下列说法中，正确的是（）

A	-aⁿ和（-a）ⁿ一定不相等
B	-aⁿ和（-a）ⁿ一定互为相反数
C	当n为奇数时，-aⁿ和（-a）ⁿ相等
D	当n为偶数时，-aⁿ和（-a）ⁿ相等

正确答案：Qw==

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

3/5单选题

难度：

3.下面是某同学在一次测验中的计算：①3a+2b=5ab，②4m²n-5mn³=-m³n，③3x³（-2x²）=-6x⁵，④4a³b÷（-2a²b）=-2a，⑤（a³）²=a⁵，⑥（-a）³（-a）=-a²，其中正确的个数是（）

A	1个
B	2个
C	3个
D	4个

正确答案：Qg==

6Kej77ya4pGg77yM4pGh5LiN5piv5ZCM57G76aG577yM5LiN6IO95ZCI5bm277yM5pWF5pys6YCJ6aG56ZSZ6K+v77ybPGJyPuKRojN4PHN1cD4zPC9zdXA+77yILTJ4PHN1cD4yPC9zdXA+77yJPS02eDxzdXA+NTwvc3VwPu+8jOato+ehru+8mzxicj7ikaM0YTxzdXA+Mzwvc3VwPmLDt++8iC0yYTxzdXA+Mjwvc3VwPmLvvIk9LTJh77yM5q2j56Gu77ybPGJyPuKRpOW6lOS4uu+8iGE8c3VwPjM8L3N1cD7vvIk8c3VwPjI8L3N1cD49YTxzdXA+Njwvc3VwPu+8jOaVheacrOmAiemhuemUmeivr++8mzxicj7ikaXlupTkuLrvvIgtYe+8iTxzdXA+Mzwvc3VwPu+8iC1h77yJPWE8c3VwPjQ8L3N1cD7vvIzmlYXmnKzpgInpobnplJnor6/vvJs8YnI+5omA5Lul4pGi4pGj5Lik6aG55q2j56GuLiA8YnI+5pWF6YCJQi4g

4/5单选题

难度：

4.下列运算中，正确的是（）

A	2ac（5b²+3c）=10b²c+6ac²
B	（a-b）²（a-b+1）=（a-b）³-（b-a）²
C	（b+c-a）（x+y+1）=x（b+c-a）-y（a-b-c）-a+b-c
D	（a-2b）（11b-2a）=（a-2b）（3a+b）-5（2b-a）²

正确答案：RA==

6Kej77yaQeOAgeW6lOS4ujJhY++8iDViPHN1cD4yPC9zdXA+KzNj77yJPTEwYWI8c3VwPjI8L3N1cD5jKzZhYzxzdXA+Mjwvc3VwPu+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5C44CB5bqU5Li677yIYS1i77yJPHN1cD4yPC9zdXA+77yIYS1iKzHvvIk977yIYS1i77yJPHN1cD4zPC9zdXA+K++8iGItYe+8iTxzdXA+Mjwvc3VwPu+8jOaVheacrOmAiemhuemUmeivr++8mzxicj5D44CB5bqU5Li677yIYitjLWHvvInvvIh4K3krMe+8iT1477yIYitjLWHvvIktee+8iGEtYi1j77yJLWHvvIti77yLY++8jOaVheacrOmAiemhuemUmeivr++8mzxicj5E44CB77yIYS0yYu+8ie+8iDExYi0yYe+8iT3vvIhhLTJi77yJ77yIM2ErYu+8iS0177yIMmItYe+8iTxzdXA+Mjwvc3VwPi4gPGJyPuaVhemAiUQuIA==

5/5单选题

难度：

5.下列式子中不成立的有（）
（1）（x-y）²=（y-x）²
（2）（x+y）（x-y）=（-x-y）（y-x）
（3）（a-2b）³（2b-a）=（a-2b）²（2b-a）²；
（4）（x-2）（x²-2x+4）=x³-8
（5）（x-y）²=（x+y）²-4xy

A	1个
B	2个
C	3个
D	4个

正确答案：Qg==

6Kej77ya77yIMe+8ie+8iHgtee+8iTxzdXA+Mjwvc3VwPj14PHN1cD4yPC9zdXA+LTJ4eSt5PHN1cD4yPC9zdXA+Pe+8iHkteO+8iTxzdXA+Mjwvc3VwPu+8jOaIkOeri++8mzxicj7vvIgy77yJ77yIeCt577yJ77yIeC1577yJPXg8c3VwPjI8L3N1cD4teTxzdXA+Mjwvc3VwPj3vvIgteC1577yJ77yIeS1477yJ77yM5oiQ56uL77ybPGJyPu+8iDPvvInvvIhhLTJi77yJPHN1cD4zPC9zdXA+77yIMmItYe+8iT0t77yIYS0yYu+8iTxzdXA+NDwvc3VwPuKJoO+8iGEtMmLvvIk8c3VwPjI8L3N1cD7vvIgyYi1h77yJPHN1cD4yPC9zdXA+77yM5LiN5oiQ56uL77ybPGJyPu+8iDTvvInvvIh4LTLvvInvvIh4PHN1cD4yPC9zdXA+LTJ4KzTvvIk9eDxzdXA+Mzwvc3VwPi0yeDxzdXA+Mjwvc3VwPis0eC0yeDxzdXA+Mjwvc3VwPis0eC044omgeDxzdXA+Mzwvc3VwPi0477yM5LiN5oiQ56uL77ybPGJyPu+8iDXvvInvvIh4LXnvvIk8c3VwPjI8L3N1cD49eDxzdXA+Mjwvc3VwPisyeHkreTxzdXA+Mjwvc3VwPi00eHk977yIeCt577yJPHN1cD4yPC9zdXA+LTR4ee+8jOaIkOeri++8mzxicj7mlYXlhbHmnInvvIgz77yJ77yINO+8iTLkuKrkuI3miJDnq4vvvIw8YnI+5pWF6YCJQi4g