合并同类项综合练习题74.docx
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合并同类项综合练习题74
9a-4a+2a10m-4a+5m+8a
6b-8n+13b-3n+14b-14n7mn+18mn-10mn-mn
25a2b+8y2z-28a2b+7y2z9y-4y2-2y+10y2-7
5775
—z+—t+—t-—z5y2+6ab-4y2+2
4848
1
—xy+3m+4xy9ab-2x2y-6ab-10ab
7
9a-3a-5a4y+5a+8y-7a
6b-8n+7b+9n+18b-15n8ab-8ab+16ab-ab
18a2b+7y2z-28a2b+4y2z5t-2t2+6t+19t2-1
1875
—z-—n+—n+—z14n2+4pq-5n2+4
4747
7
—xy+7z+6xy4ab+13a2b+8ab+24ab
6
2f+6f-9f8y-6b-4y-7b
6b-8n-18b-20n+18b+14n3pq-8pq+18pq+pq
19a2b+4y2z-20a2b+8y2z7z-8z2-5z-5z2-1
1875
—z-—t+—t+—z15m2+3ab+4m2+4
4747
3
—pq+7z-7pq2ab+13x2y+6ab+4ab
2
9b-8b+2b9m+8c+8m+10c
4m+5d+7m+10d+17m+15d7xy+2xy+13xy+xy
28x2y-5b2c+5x2y-9b2c6x+9x2+8x-17x2+8
4975
—x+—n-—n+—x19n2+4xy+2n2+1
5858
1
—mn-6y+4mn7mn+19a2b+6mn-14mn
5
3c+8c-4c7n-3a+8n+9a
6a+7n-20a+19n+17a+10n8ab+4ab-17ab-ab
12a2b+3y2z+24a2b-8y2z9y-4y2-9y+18y2-1
2175
—x-—t+—t-—x10n2-4mn-2n2+7
3636
1
—ab+2y+9ab8ab-15a2b-18ab-21ab
6
9e-8e+3e3m+6f+4m-4f
2a-7c-10a+16c+10a+18c9mn-6mn-15mn-mn
2x2y+3b2c-26x2y-6b2c2t-7t2-3t+12t2+4
4975
—z-—t+—t+—z13x2-6mn-6x2+9
5858
3
—ab+4y+6ab5mn+12x2y-19mn-10mn
4
9a-8a-2a2m-3c+4m+9c
3a-3n-7a-18n-12a+19n2xy+15xy-17xy+xy
13x2y-6y2z+11x2y+3y2z5t+8t2-3t-14t2-7
1175
—z+—n+—n-—z18m2+9xy+3m2-5
2828
7
—mn+7x-3mn6xy+14x2y+19xy+13xy
6
7d+2d+3d5y+3e-8y+10e
5b+3c-15b+4c+10b+16c4ab-13ab-18ab-ab
18a2b+2b2c-25a2b-9b2c9z+6z2+7z-8z2+4
3575
—x-—n+—n-—x20m2+9pq+8m2-1
4646
6
—pq-2z+9pq3pq+15x2y+19pq-6pq
5
4b+7b+3b9x+8d+7x-3d
8m+8c-2m-13c-12m+11c2ab+2ab-15ab-ab
7a2b+3b2c-22a2b-6b2c6n+4n2+7n+11n2+7
1175
—z+—t+—t+—z20t2+4pq-8t2+6
2727
1
—xy+5m+2xy9ab+18a2b-2ab+27ab
6
9b+9b-4b2n+8c+3n-7c
2m+6d-7m-8d+11m-11d5xy-6xy+16xy-xy
11a2b+9y2z-30a2b+9y2z7x+7x2-9x+9x2-8
1775
—z+—n+—n+—z19n2-3mn+4n2+9
2828
8
—xy+2m+2xy8xy+8x2y+3xy-13xy
7