初一数学上册合并同类项专项练习题68.docx

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初一数学上册合并同类项专项练习题68.docx

初一数学上册合并同类项专项练习题68

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2a-5n+7a-8n-11a-18n4pq+11pq-20pq-pq

13x2y-5y2z-27x2y+5y2z6z-7z2+4z+18z2+2

1675

—x+—y+—y-—x19z2+3pq+9z2+5

2727

1

—xy+4m-5xy3mn-12x2y-17mn+20mn

6

4a-6a-4a5z+3b-7z-3b

6m-9d+17m-12d-10m+13d4xy+6xy+18xy+xy

14x2y-8y2z+23x2y+8y2z9y-2y2-7y+11y2+9

1175

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5858

1

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7

8a+4a+9a10t+5f-3t+6f

9b-8c-20b-12c-18b-13c3pq-20pq+15pq-pq

9a2b+4b2c-26a2b-8b2c6z+5z2+9z+15z2+3

1575

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4646

1

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4

5e+2e-5e8m+4e-3m+10e

9m+8n-16m-4n+20m+11n3pq+5pq-13pq+pq

6a2b-7y2z+26a2b+5y2z9x+9x2+3x-14x2+2

2175

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3636

1

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7

5f-8f-6f8n+9e+6n+8e

7m-3n+13m-10n+16m+17n2mn-6mn+10mn-mn

20x2y-4b2c-9x2y-3b2c2t-5t2+3t+8t2+2

4175

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3838

7

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8

6f-3f+3f4t-8f-4t-10f

8m+2c-2m+18c-20m-11c7xy+14xy+19xy+xy

27a2b-5y2z+26a2b+8y2z7z+3z2+6z+3z2-3

1175

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2727

1

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7

5d-4d+9d4z-6e-5z-5e

6b+4d-13b-14d+20b+18d8xy-4xy+14xy-xy

23x2y-9b2c+2x2y+9b2c6n+6n2-4n-11n2-9

2175

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3737

7

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8

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8m-9d-18m-5d-20m+12d3pq+20pq-13pq-pq

16a2b+2y2z-3a2b+7y2z6y+9y2-6y+5y2+8

1175

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4747

1

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3

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9b-7c+13b-12c+11b-18c9xy-10xy-16xy-xy

20a2b+7y2z-9a2b-9y2z2x+8x2-9x+16x2+2

2575

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3636

7

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8

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16x2y-5b2c+13x2y+4b2c9t+8t2-8t-7t2-3

4575

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3636

1

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5

2d-3d-8d9x-2c-6x+10c

4a+7n-16a-12n-10a+18n2mn+4mn-20mn-mn

14x2y-3y2z-2x2y-3y2z3y-9y2+7y-15y2+3

4175

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5757

1

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2

2c-4c-8c7m+9a-3m+8a

6m+7d+17m-11d-12m+18d2pq-8pq-10pq-pq

14x2y-5b2c-13x2y-6b2c2t+8t2+8t+19t2-1

1175

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2626

2

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3

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