合并同类项综合练习题140.docx

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合并同类项综合练习题140.docx

合并同类项综合练习题140

7d-4d+5d2x+8d-9x-4d

6a+6c-5a+6c+20a-17c3pq-15pq+19pq-pq

25a2b-4b2c-5a2b-3b2c9n-7n2-8n-9n2-8

1775

—m-—y-—y+—m12m2+9pq+5m2-6

5656

8

—mn+4x-3mn7ab+4x2y-4ab-28ab

7

5d+8d+2d7y+7e+3y-6e

3a+8n-3a-20n+20a+18n5mn-10mn-15mn-mn

23x2y+2b2c-4x2y-9b2c9y-9y2+3y+4y2-6

4975

—x+—y-—y-—x6t2-6xy-3t2+4

3838

1

—ab+9n+2ab9xy-9a2b+15xy-25xy

7

6a+9a+6a2n-2b+6n+2b

9a+7n-20a+4n-14a-13n8pq+2pq-13pq+pq

24a2b-9b2c+28a2b+8b2c3m+4m2+2m+17m2-5

3175

—m-—n+—n+—m9y2-6ab-7y2+4

4848

5

—ab-8x+6ab3mn-4x2y-20mn-5mn

6

3a+2a+2a6n+4d+6n-4d

2a-8d-10a+12d-13a-15d8ab-15ab-15ab-ab

24a2b+7y2z+28a2b-3y2z9x-6x2+6x+6x2+4

1875

—x+—n-—n-—x3z2-3pq+6z2-6

4747

3

—pq-5y-6pq4xy-17a2b+9xy+2xy

2

2a+8a-4a4y+6a-5y+7a

3a-3d+15a-2d-18a-16d2xy+10xy+15xy+xy

4x2y-5y2z-13x2y+4y2z8t-5t2-9t+3t2+5

4175

—m-—y+—y+—m6t2-9mn+5t2+4

5858

3

—ab-9m+6ab2ab+13x2y-7ab-4ab

2

8f+4f+7f3t-8e+2t-10e

6a+8n-8a-8n-14a-14n5ab+16ab-15ab-ab

15a2b+4b2c+19a2b+9b2c2x+7x2-6x-8x2-4

1175

—z-—y-—y-—z7n2+9ab-4n2-9

4848

6

—pq-9n+4pq5xy-3x2y+12xy-30xy

5

5b+8b+9b6x-8e+6x+2e

2m-4n+11m-12n+17m-11n9pq+15pq-19pq+pq

20x2y+8b2c+24x2y+5b2c4x+6x2+8x-8x2-1

6975

—z+—y+—y+—z17y2-5xy+4y2+9

5858

2

—pq-9x-5pq4mn+11a2b-13mn+20mn

3

3c+5c-8c5t+5e-7t-8e

7m+8n+16m+16n+19m-17n6ab+9ab-15ab-ab

22x2y-8b2c+4x2y-6b2c3t-2t2-4t-3t2+1

1975

—m+—n+—n+—m12z2+5xy-5z2+8

5858

9

—ab+5m+7ab5xy-14x2y+11xy-17xy

8

5d-6d+2d4t-4f+6t+6f

4a+7n-3a-9n-11a+17n7pq-14pq-14pq-pq

23a2b-5b2c-21a2b-3b2c8m-7m2-6m+19m2+1

4175

—x-—n+—n-—x15t2+7mn-8t2+7

5656

2

—ab+8m+5ab8xy+11a2b-8xy-25xy

3

8f-7f+2f8t-6a+6t-5a

2b-9n-4b+9n-15b+18n9mn+3mn+10mn+mn

10a2b+6b2c+22a2b+8b2c8x-9x2+4x+8x2-2

2675

—z+—t+—t+—z13m2-6pq+5m2+9

3737

1

—xy-8x-8xy4xy+11x2y-14xy-29xy

3

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