初一数学上册合并同类项专项练习题3.docx
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初一数学上册合并同类项专项练习题3
5d+7d+4d6y+2e-8y-7e
3a-2c+9a+20c+12a+14c5mn+14mn-15mn+mn
25a2b+8y2z-14a2b+8y2z4z+4z2+5z+14z2-9
1175
—z-—y+—y-—z5y2+6xy+2y2+9
2727
1
—xy+3y+5xy8mn+15a2b-14mn-7mn
2
7a+3a+2a5t-7a+5t+2a
2a+3c-3a-15c-11a+13c2pq+11pq+20pq-pq
20a2b+4b2c+8a2b-2b2c8y+6y2+4y+2y2-1
4175
—x+—n+—n-—x10y2+5mn-6y2-4
3636
4
—xy-6z+7xy2pq-9a2b-10pq+11pq
5
9c-5c-8c3z+2f+4z-10f
2m-7c+19m-11c-16m-13c8ab-8ab+18ab-ab
16a2b-5y2z-20a2b+2y2z5y+4y2-3y-20y2+6
3975
—m+—t+—t+—m11n2+3pq+9n2+1
2828
1
—xy-2n+8xy2ab-9a2b+15ab+21ab
2
8f+2f+9f8t-3b-9t-8b
3a-5d-9a-20d+11a+13d7ab-12ab+17ab-ab
18x2y+4b2c-7x2y-6b2c7t+7t2-3t-9t2-7
5575
—z-—y+—y+—z4t2-4xy-6t2-7
4646
1
—ab+6n+9ab6pq+18x2y-7pq-19pq
4
5b+9b-9b6x+2f-5x+7f
2a-6d+10a-2d-17a-12d2pq+8pq+15pq+pq
27x2y-3b2c-5x2y+6b2c7y+2y2-5y+12y2-6
4575
—m-—n-—n+—m13z2+2pq-8z2+9
3636
1
—xy+7z-5xy7mn-4a2b-5mn+21mn
2
2e-4e+5e10z-5a-4z-5a
3b+5n-3b+3n+14b-10n8mn-18mn-11mn-mn
29x2y+6b2c-7x2y-8b2c6x-5x2+9x-12x2-5
2675
—z-—n-—n+—z4z2+6pq-6z2+9
3737
1
—xy+2z+8xy7pq-8x2y+12pq+21pq
2
2d+5d-3d7y+6d-7y-6d
9a+4d+20a-7d-13a-16d7ab+3ab+15ab+ab
10x2y+9b2c-7x2y+4b2c3m+5m2-4m+5m2-5
2875
—x+—n+—n+—x7t2+5mn-4t2+1
3737
4
—mn+5m+4mn3ab+17a2b-18ab-25ab
5
3a-9a-7a10n+4a-5n+5a
9m+8n-15m-10n-11m+13n5mn-6mn+10mn+mn
6x2y+3b2c-22x2y+9b2c4z+2z2-8z+6z2-2
1675
—z-—n+—n-—z20n2+3pq+8n2+6
2727
1
—xy-6x-8xy7mn-9x2y-13mn-7mn
7
3d-6d+6d7x-5a+7x-5a
6a+4c+17a+19c-17a+20c9xy-11xy+17xy+xy
14x2y-7b2c+3x2y+8b2c7m-5m2-6m+19m2-8
6175
—m+—t+—t+—m15n2-5ab+6n2+7
5656
1
—ab-7m+8ab3pq+20x2y+9pq+7pq
4
6c-2c-7c4y+3e+9y+4e
6b+6c-18b-15c-17b-14c8xy-16xy+18xy-xy
27x2y-2y2z-15x2y-2y2z6x+2x2-3x-17x2+5
1875
—x+—t-—t+—x2x2+3mn-7x2+6
4747
1
—pq-4m+4pq2xy+14x2y+8xy-3xy
2
6c+7c+8c6n+8f+7n+4f
6m+3c+14m-9c+16m-14c3mn-12mn-14mn+mn
6a2b-7y2z+2a2b+2y2z6m+4m2+7m+20m2+8
3975
—z+—y-—y+—z8z2+4mn-5z2-5
2828
9
—xy-3t-7xy3mn-19a2b-17mn-9mn
8
7d-2d-7d5z-7f-4z-6f
2m+4c-3m-7c-13m+11c3mn+15mn+14mn+mn
2x2y+4y2z-12x2y+4y2z8m+4m2+4m-18m2-9
1575
—z+—t+—t+—z18m2-3pq-9m2-8
3636
4
—pq-5n+9pq3xy-17x2y+8xy+7xy
3