合并同类项综合练习题28.docx
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合并同类项综合练习题28
2f-2f-4f8m+5c-2m+9c
4a+6c+7a-12c+20a+18c3ab-20ab-19ab+ab
15x2y+3b2c+8x2y-4b2c5z+6z2+6z-19z2-9
1975
—x-—t-—t-—x13z2+6mn+7z2+2
2828
5
—mn-6z-8mn6ab+13x2y-17ab-3ab
6
3d+6d-5d7y-9e-3y-5e
6b+6d+5b+2d-20b-17d8ab-7ab-19ab+ab
14a2b-9y2z-7a2b-8y2z6n-7n2-5n-11n2-8
3175
—m-—y+—y+—m15t2+7mn-5t2+7
2626
3
—ab-8x-4ab7pq-8x2y-10pq-23pq
2
6c+8c+5c7t-6c+8t+3c
2a+9c+20a-9c+18a-19c6ab+9ab+16ab-ab
10x2y+3y2z-3x2y+2y2z6m-5m2-3m+14m2-5
1775
—z-—y+—y-—z15t2-4mn-3t2-5
4646
1
—xy-2m+4xy8mn+20a2b+12mn-11mn
6
8b+5b+8b6x-2d-6x+6d
3m-8d-8m+16d+12m-14d5mn-8mn+18mn-mn
3a2b+5b2c+7a2b+4b2c4x-6x2-2x-18x2+5
1775
—m-—t+—t-—m16m2-7pq+5m2-6
4848
1
—mn+6n-8mn4pq-12a2b+3pq-17pq
3
9c+7c-7c4x-8c-2x+9c
4a+5n+15a-19n+17a+16n9mn-7mn-11mn-mn
28a2b+6b2c+29a2b-7b2c6x-7x2+6x-2x2+5
6775
—m-—t-—t-—m10m2-7xy+6m2+4
5858
1
—ab+5t-6ab7pq+19a2b-15pq-3pq
7
4e+3e-3e6x+5c+2x-9c
8m-8c-16m+8c+10m-16c9mn-4mn-17mn+mn
21x2y+3y2z-24x2y-9y2z8x+2x2+4x-14x2-1
4975
—z-—n-—n-—z14y2-4xy+3y2+5
5858
1
—ab+2z-9ab9mn-15a2b-8mn-29mn
7
4f+6f+6f6x-6b+2x+3b
2b+5d-7b-10d-12b+10d2xy+7xy+12xy-xy
6a2b+6y2z+10a2b+6y2z5n-6n2-9n+2n2+6
6875
—m-—t+—t+—m15m2+5ab+8m2-4
5757
4
—mn-8t-8mn4mn+17a2b+9mn-23mn
5
7d+3d-3d7x-4a-6x+10a
4b+2n-5b-4n-10b-13n9ab+6ab-17ab+ab
23x2y-4b2c-13x2y-8b2c9t+3t2-6t+14t2+7
1875
—m-—y-—y+—m6t2+9ab-6t2+2
2727
3
—mn+3z+4mn3mn-10a2b-13mn-19mn
4
3f-5f+5f8x+8c-6x-2c
4a+4c+3a+16c+15a-18c9pq-9pq+15pq-pq
7x2y+9b2c-13x2y+6b2c9t+4t2-9t+3t2+7
4675
—m+—y-—y-—m8z2+3mn-2z2+9
5757
1
—xy-7n+2xy5ab+19x2y+20ab+6ab
2
3c+8c-7c8t+4a-3t-4a
6b+8c-3b-6c+15b-17c5ab+11ab+10ab+ab
9a2b-3y2z+20a2b-2y2z2t-2t2-6t+15t2-6
1575
—x-—y-—y+—x20t2-9ab-8t2-7
3636
2
—xy-6n+4xy3pq+8a2b-7pq+18pq
3