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合并同类项综合练习题131

合并同类项综合练习题131
合并同类项综合练习题131

5e+5e-3e 10x+2d-4x-8d

8b+6c-18b+10c-18b-18c 6pq+18pq-14pq+pq 30x2y+7y2z-10x2y-2y2z 7m+8m2-2m-6m2-8

4 1 7 5

—m+—t+—t-—m 2x2+5mn-7x2+2

5 7 5 7

1

—ab-5t-2ab 7pq+3x2y-6pq+9pq

2

2e-2e+3e 8m-7c-5m+9c

2m-2d+5m+6d+16m+17d 3mn-10mn+20mn-mn 9a2b+8y2z+11a2b-5y2z 3z-2z2+8z-7z2+4

3 9 7 5

—m+—y+—y+—m 10y2+3pq-6y2+8

2 8 2 8

6

—mn+9z+3mn 2ab+8a2b+4ab-4ab

5

5f-6f+7f 5y-8a-7y-9a

5m-3c+17m-9c-14m+16c 9mn+11mn-11mn+mn 15a2b-8y2z-8a2b+4y2z 5t-6t2+7t-3t2-1

1 1 7 5

—z+—y+—y-—z 18m2+7mn-8m2+9

3 6 3 6

4

—xy+3z+6xy 4mn+3a2b+10mn+22mn

5

4a-4a+4a 8x-2f-9x-9f

9b+8c+7b+8c+10b+13c 8xy+16xy-20xy+xy 10x2y+3y2z-4x2y-6y2z 9n-2n2+8n-14n2-1

6 7 7 5

—x-—y+—y+—x 13m2-4xy+8m2-2

5 6 5 6

1

—xy-5y+6xy 9ab+11a2b-11ab+17ab

3

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