合并同类项综合练习题42.docx
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合并同类项综合练习题42
9a-5a-4a4m+9c-8m+3c
4a-6n-10a-2n-20a+20n8xy-3xy-12xy-xy
14a2b-5y2z+15a2b-7y2z5m-8m2+2m-15m2+1
2175
—z-—y-—y-—z17m2-7xy+8m2-3
3838
6
—xy-3n-9xy2xy-18a2b-9xy-17xy
7
6f+5f-4f4m+9f+3m-5f
5b+8c+4b-17c-16b-11c9pq-20pq-19pq-pq
20a2b+3y2z+25a2b-5y2z6m+6m2-8m+4m2+9
4175
—x-—n-—n+—x6y2-2ab+9y2+4
3737
1
—ab+8n+6ab7ab+3x2y-4ab+17ab
8
9b-7b-3b8z-5c-8z-6c
4m-6d+19m+16d+18m-18d5xy-8xy-12xy+xy
10x2y-7b2c-6x2y-5b2c5n+7n2-3n-18n2+8
1175
—x+—y-—y+—x5m2-5pq-3m2+5
4646
1
—mn-7y+4mn6pq+7a2b+14pq-30pq
2
3d+5d+3d5t+2e+2t-10e
4m+9n+20m+11n+17m-18n5ab+4ab-18ab-ab
13x2y-2y2z-5x2y-7y2z7m+2m2+7m+9m2-6
1975
—m+—y+—y-—m8m2+9ab-7m2-1
2828
4
—pq+3x-4pq4pq-11a2b+8pq-20pq
3
9d-3d-5d8t+6f-7t+10f
9a+4c+11a+20c-10a+12c3xy+13xy+10xy-xy
27a2b-2b2c+16a2b+2b2c6z-6z2+3z-16z2+3
3975
—z+—n-—n+—z2y2-5mn+7y2+2
2828
1
—pq-4z+9pq5xy-4a2b-5xy+8xy
5
8f+5f-9f7m+6d+2m-7d
5b+8c-8b+17c+15b-10c3pq+17pq-18pq+pq
9a2b-2b2c+28a2b+7b2c7t-6t2+9t-8t2-1
1575
—m+—n-—n+—m2y2-7mn-5y2+2
5656
2
—xy+5y-5xy6ab+20x2y-20ab-2ab
3
9a-3a+5a5y-2d-4y-4d
6a+7d+15a+2d-17a+10d5mn-18mn-18mn+mn
27a2b+7b2c-20a2b-7b2c3y+7y2+8y-10y2+7
1775
—m-—y-—y-—m3n2-6xy-2n2-8
5656
7
—pq+8y+4pq5ab+17x2y+19ab-29ab
6
6a+5a-2a2m-2d-6m-9d
4m+4c-10m-2c-11m+14c6xy-14xy-20xy+xy
29a2b-9y2z+30a2b+5y2z5y-2y2-7y-17y2-5
1175
—x-—n+—n-—x5x2+6xy+7x2-9
4747
5
—ab-9m+9ab9pq-15a2b-15pq+14pq
6
6a-5a+3a7x+4c-6x+9c
9m+6c-8m+15c+11m-16c3ab-20ab-15ab+ab
27x2y+2y2z-11x2y-4y2z5y+2y2+5y-15y2-4
3675
—m+—t+—t-—m12z2+7pq-6z2-5
2727
8
—ab+4x-6ab9pq-11a2b+11pq+25pq
7
7a-9a+4a10x-7e-9x+4e
7m-6d-8m-15d-20m+20d3ab-3ab-18ab+ab
24a2b+7b2c-7a2b-5b2c6m-7m2+3m+16m2+4
5675
—z+—y-—y-—z14t2+4ab+5t2-4
4747
8
—pq+3n-3pq6pq+11x2y-4pq+12pq
7