合并同类项综合练习题88
3e+3e-3e 8y+2c+7y+8c
6b+5n+14b+17n-15b-20n 7mn+4mn-10mn+mn 16a2b+6b2c-27a2b-5b2c 3n-4n2-6n+10n2+7
1 8 7 5
—z-—t-—t+—z 5y2-5xy-6y2-3
4 7 4 7
1
—pq-9n-9pq 3xy-6a2b-3xy-13xy
3
8m-5n+16m+6n-19m+10n 8pq+10pq-11pq+pq 7x2y-6y2z+6x2y+5y2z 3t+7t2+3t+14t2+4
3 9 7 5
—m-—y-—y+—m 10n2+9mn+8n2+3
4 8 4 8
4
—ab-9n+2ab 7pq-12x2y-17pq-27pq
5
5a+4d+9a+9d-14a+19d 7pq+6pq+16pq+pq 6a2b+6b2c+30a2b+6b2c 6z+3z2-3z+5z2+3
1 8 7 5
—z+—t+—t-—z 17y2-9mn+3y2+6
5 7 5 7
1
—ab-5n-2ab 8mn+16a2b-12mn-8mn
4
9f+4f-4f 7y+6b-6y-5b
5a+4c+9a+16c-19a+15c 9xy+18xy-15xy+xy 23a2b+6b2c-25a2b-2b2c 3m+2m2+5m+16m2+5
5 1 7 5
—z-—n+—n+—z 2y2-5ab+2y2+4
4 8 4 8
3
—mn+6z-2mn 2xy-16x2y-20xy-10xy
2
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