初一数学上册合并同类项专项练习题45.docx

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初一数学上册合并同类项专项练习题45.docx

初一数学上册合并同类项专项练习题45

8a-2a-7a7x-7a+2x-10a

7m-3n+9m-17n+10m-12n7xy-18xy-12xy+xy

7x2y-7b2c+6x2y-2b2c5y-2y2+9y-6y2+9

1775

—m-—t+—t+—m14y2+9xy+8y2-6

5656

4

—ab-4n+9ab3ab+20x2y-13ab-6ab

3

9e-9e+7e7x-2c-5x+9c

4m+6c+2m+3c+19m+11c8xy-15xy+11xy-xy

25x2y+5y2z-21x2y-4y2z6y+4y2-5y+13y2+7

5775

—x-—n+—n+—x5x2-8ab-5x2-1

4646

1

—mn-8z-6mn5pq+13a2b+2pq+28pq

3

9a-6a-4a8m-9f-9m+3f

6m-5d+16m+7d-11m+14d6mn-19mn-16mn-mn

27a2b-3y2z-27a2b+9y2z7z+6z2+3z-20z2-9

6175

—m-—y-—y-—m17t2-5xy-4t2+1

5656

7

—mn-7m-6mn6ab+19a2b+16ab+14ab

6

9d-6d-8d9z+5c-6z-6c

7a-5d+6a-15d-19a-10d5ab-3ab-13ab+ab

30x2y-2y2z+2x2y+3y2z8t+4t2-8t+17t2-2

1775

—x-—n+—n-—x4m2-7mn+3m2+3

3838

1

—xy+8y-4xy3pq+12a2b-18pq+10pq

4

9d-4d-9d10n+5d+7n-10d

9m-7d-3m-6d-14m+15d6mn-17mn+13mn-mn

5a2b-6b2c-2a2b-7b2c8y+6y2+2y-2y2-4

1875

—z-—y-—y-—z9z2-6mn-3z2-5

2727

8

—mn-4x-8mn4mn+5a2b+11mn+5mn

7

6d-7d-8d7t+4e-6t+2e

9b-3n-11b-15n-20b+13n7mn-9mn+12mn-mn

2x2y+8b2c-9x2y+8b2c2m+2m2-6m-19m2-2

1775

—z-—t+—t-—z5y2-4ab+5y2+5

2828

4

—ab+4t+4ab8ab-10a2b+14ab+2ab

3

3f-6f-6f9n+2e+2n-9e

3b-2d+19b-18d+20b+12d4xy+11xy+11xy+xy

15x2y+9b2c+12x2y-6b2c6z+2z2-3z+6z2+1

4875

—m+—t+—t+—m13x2-8mn+8x2-6

5757

3

—mn+9n+7mn4pq+4a2b+6pq-16pq

4

9b-7b-6b2t-7f-7t-4f

3a+6d-9a+9d+19a+12d9ab+12ab+17ab-ab

10x2y+6y2z-6x2y-4y2z3z-3z2-8z-13z2-1

4675

—x-—n+—n-—x10x2+7ab+9x2-1

5757

7

—pq-4x-9pq4pq+19x2y+17pq+17pq

8

8e+3e-7e6z+5a-3z-8a

3a-5d-8a-14d-15a+14d8mn-14mn+15mn+mn

14x2y-5b2c-28x2y+9b2c9m-3m2-4m+9m2-1

3775

—x+—n+—n+—x7z2-2mn-9z2+9

2828

2

—xy-6m-9xy3pq-9x2y-20pq-11pq

3

8b-9b-2b7z-7a+5z+9a

5a+5c+17a+18c+19a+18c6pq+16pq-20pq+pq

22a2b-3y2z+5a2b+9y2z3z-3z2-6z+11z2-8

1775

—z+—n-—n-—z2x2-3pq-9x2-2

3838

1

—pq-5t+9pq8pq+3a2b+3pq-13pq

2

7a-2a-4a4t-6b+8t-3b

5a-2n-5a-2n+19a-11n6xy-8xy+17xy-xy

27x2y+8b2c+24x2y+2b2c9t+6t2-6t-7t2+7

3875

—m+—y+—y+—m15n2-2mn+2n2-2

2727

7

—xy+4n+3xy4xy+11x2y+19xy+18xy

6

3f+8f+2f10t-4d-8t+10d

5b-9d-9b-13d-19b-14d9pq-5pq-20pq-pq

5x2y-2b2c-6x2y+4b2c4t-8t2+8t+15t2+8

3775

—z+—n+—n+—z20m2+3xy-7m2+3

2828

3

—pq-7t-5pq9xy-7a2b+7xy-22xy

4

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