合并同类项综合练习题25.docx

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合并同类项综合练习题25.docx

合并同类项综合练习题25

7f-9f+8f7z-7b-2z-7b

5b-4c+8b-17c+20b+11c3mn+6mn-12mn-mn

9x2y+9b2c-19x2y+3b2c5x-6x2-3x+18x2-5

4775

—z-—t+—t-—z20x2-6ab+2x2+3

5858

7

—pq-2t-7pq9mn-16x2y-20mn-17mn

8

9f+9f-5f9t+3c+6t+2c

4b-5n+4b+10n+16b+15n6pq+11pq+14pq+pq

15x2y-6y2z-30x2y+8y2z7n-5n2-8n+8n2-7

1775

—m+—n+—n-—m18t2-4mn-4t2-8

2626

1

—mn+2y+8mn4ab-14a2b-17ab+5ab

2

4c+7c-3c5m-7c+2m+4c

9a+7d-11a+17d-19a+13d3xy+8xy-10xy-xy

24x2y+3b2c+2x2y+2b2c2n-8n2-4n-14n2+9

1875

—z+—t-—t+—z20n2-3xy-5n2+9

5757

1

—mn+7m-9mn2xy+6x2y+17xy+19xy

7

3b-8b-9b4n+8f+5n-4f

4a-5n+10a+5n+10a+13n5ab-11ab+10ab+ab

28x2y+9y2z+14x2y+8y2z7t-4t2+8t-2t2-1

1175

—z-—t+—t-—z2t2+5mn-6t2-5

2727

1

—pq+5x-9pq2mn+9a2b+20mn+4mn

5

8f-7f-4f4y-7a+3y-5a

3a-7d-3a-7d+16a-17d9xy-20xy-18xy-xy

25x2y-9b2c+13x2y-4b2c6n+7n2-4n-5n2+9

3975

—z-—t+—t+—z6z2+9pq-9z2+7

2828

7

—ab-2x-6ab8xy+8x2y+2xy-9xy

8

6c+7c+4c10x+2c-5x-3c

5m-3n+12m+9n+16m+10n5ab-7ab+12ab+ab

13a2b+7b2c+29a2b-2b2c8z+5z2+7z-10z2+1

1875

—z+—y+—y-—z13z2+9pq+3z2+1

2727

7

—mn-3m+8mn6pq+17x2y-3pq-7pq

8

7a-7a+6a10t-8d-7t-7d

9a-5n-7a-11n+15a-10n9ab-3ab+10ab+ab

26a2b-3y2z+4a2b+2y2z2x+6x2+7x-4x2-2

4575

—m-—n-—n+—m15y2-6ab-8y2-5

5656

1

—pq+2m+2pq8pq+9x2y-9pq+4pq

6

3f+4f-7f4x+2a+8x-5a

6m-4d+5m+5d+14m-20d3mn+3mn-20mn-mn

17a2b-2b2c-17a2b+7b2c2t+5t2+4t+15t2-8

2775

—m+—y-—y-—m4y2+2pq-6y2+2

3838

2

—pq-9m+2pq7xy-4x2y+7xy+15xy

3

3a+8a-4a4t-7a+5t-6a

8b+7d+17b+18d-13b-12d3ab-15ab+20ab-ab

5x2y-4y2z+10x2y+7y2z9x+7x2-8x-5x2+4

1775

—x-—n-—n-—x9t2+4xy+4t2-2

4848

1

—mn-4y-5mn5xy-5a2b-14xy-21xy

8

5b-7b-9b8z-2f-6z-5f

4a+9d-9a-16d+11a+15d4mn+15mn+12mn+mn

3a2b+5b2c+16a2b+6b2c2m+5m2+5m-8m2-6

1875

—x+—t-—t-—x6x2-8ab+6x2+9

5757

1

—mn-2y+4mn2pq+12a2b+18pq-19pq

3

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