初一数学上册合并同类项专项练习题42.docx
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初一数学上册合并同类项专项练习题42.docx
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初一数学上册合并同类项专项练习题42
4e+2e+9e4n-7c+7n+3c
8a-2c+2a-16c-14a+14c8ab+16ab+14ab+ab
30x2y+2b2c+28x2y+5b2c3x-5x2+7x-4x2+6
1575
—x-—y-—y-—x20m2+6ab+9m2+9
2626
1
—pq-9z+5pq8xy+17a2b-11xy+17xy
8
5e-6e-8e7y-3b+9y+2b
7a+7n-5a-20n+14a-11n9ab+14ab+20ab-ab
14a2b+6y2z+15a2b+4y2z7n-4n2-8n+4n2-9
1775
—z+—t-—t+—z10x2-4ab-3x2-1
5656
1
—pq-6x-4pq3pq-8a2b-7pq+29pq
6
2a+3a+8a10m+8d-8m+7d
3m+8n+12m-12n+16m+14n9pq-16pq+12pq-pq
6a2b+2b2c-15a2b+5b2c7t+7t2-4t-12t2-8
1875
—z-—y-—y+—z17z2+7xy-6z2-8
4747
6
—xy+8x+8xy6ab-11x2y+11ab-2ab
7
6a+5a-2a4x-2d+3x-7d
5b+7n+19b-16n-17b+15n9xy-3xy-19xy+xy
27x2y-7b2c+11x2y+4b2c8n+2n2-4n-6n2-7
5975
—m+—t+—t-—m2x2-7pq-7x2+4
4848
1
—ab+7y-5ab6mn-10a2b+5mn-8mn
2
5e+2e-8e10x+8f-3x-2f
9a+6n-10a-15n-15a+12n4pq-14pq-14pq+pq
14x2y+5b2c-29x2y+6b2c6m-8m2-3m+15m2-4
4175
—x-—n+—n-—x18t2-7pq-9t2-5
5757
1
—pq+3z-9pq3xy-6a2b+8xy+10xy
7
8b-5b-5b9z-7c+7z+10c
3m-4n+11m-11n-19m+16n3pq-4pq+16pq+pq
27x2y+4y2z+10x2y+9y2z3m+6m2-5m-4m2+6
1975
—x+—y-—y+—x5y2+5xy-2y2-2
2828
2
—ab-9x-3ab2mn+11x2y-10mn+5mn
3
9a-5a+5a3m-8a+9m+6a
7m+8n+14m+16n+14m+16n4pq+13pq-13pq-pq
29x2y+7b2c-28x2y+6b2c5x-4x2+9x+3x2+1
1875
—z-—y-—y-—z11m2+3xy-8m2-7
2727
1
—pq+7y-8pq2xy-18x2y+13xy-22xy
5
6e+8e+8e9x-8b-8x+4b
8b+3d+14b+5d+16b-14d4xy+19xy+15xy-xy
8x2y-2b2c-25x2y-5b2c6n+4n2+6n+20n2+4
5675
—m-—t-—t+—m5n2+2pq-4n2+8
4747
3
—pq+2z-6pq7xy+18x2y-5xy+18xy
2
7c+4c-5c7y+7e-2y-2e
6b-7d-11b-9d+17b+13d5ab-3ab+11ab-ab
20a2b-8y2z-3a2b-5y2z9z+8z2-2z-17z2-7
1175
—x+—y+—y-—x16y2-7xy-4y2+6
5656
1
—ab-3x-6ab2xy+14x2y+15xy-25xy
4
7a-6a+6a5y-2a-3y-2a
9m+9c+5m+2c-15m+18c4pq-8pq+16pq-pq
22a2b-8b2c-4a2b-4b2c7x-5x2-7x-5x2-8
1775
—m-—t+—t-—m19z2+8pq-4z2+2
3636
5
—ab-3n-8ab5pq-6x2y+15pq+8pq
4
2f-9f+2f3z+6f+7z-3f
4a-3c+2a-14c-14a-11c4ab+13ab-19ab+ab
13x2y+5b2c-18x2y-5b2c6y-2y2-3y-14y2-1
1175
—z+—n-—n-—z10t2+8pq-5t2+5
5757
9
—ab-3t-7ab7pq+4a2b-11pq-8pq
8
8c-4c-4c4x+3d-4x-2d
6a+6c+18a-8c-17a+19c2xy+19xy-10xy-xy
21x2y+4y2z-30x2y+3y2z9x+6x2+2x+10x2-9
2175
—z+—y-—y+—z6x2-7ab+8x2-9
3838
1
—ab+8t-5ab2xy-14x2y-7xy+29xy
8
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