合并同类项综合练习题21.docx
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合并同类项综合练习题21.docx
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合并同类项综合练习题21
9d-5d+8d9y-5e-5y-2e
8a+9n+7a-8n-11a+15n7ab-7ab+12ab+ab
28x2y+5y2z+12x2y-9y2z8z+4z2-7z-16z2+2
1675
—m-—n+—n+—m5n2-6mn-3n2-9
3737
1
—xy+5m+6xy6pq-9a2b-2pq+24pq
3
6b+2b-6b5t+6c+5t-8c
9m-5n-6m+12n-19m+20n7mn-14mn-17mn-mn
18x2y+7b2c-17x2y+3b2c7x-3x2-7x-8x2-5
1175
—x-—y-—y-—x11y2+4xy-5y2+2
2727
6
—pq+4x+6pq5xy+5x2y+7xy-20xy
5
6a+7a-2a10n+8d+2n-8d
3a+8c-12a+16c+17a+12c2ab-13ab-10ab+ab
29x2y-3b2c-5x2y+2b2c8m-9m2-5m+2m2-3
4575
—x+—y-—y-—x6x2+2pq+2x2+6
5656
6
—ab-6x-5ab2pq-19x2y+20pq-7pq
7
6f-9f-3f9y-4d+5y-6d
6a+6n+3a+19n-20a-11n9mn+10mn+12mn-mn
16x2y+5b2c-30x2y+6b2c3n+3n2-7n-3n2+8
2975
—x-—t-—t+—x17t2-3mn+4t2+5
3838
6
—ab-6t+6ab2xy-16a2b-4xy+11xy
7
4c+8c+3c5m+6b+4m-7b
8a+5n-7a+14n-18a-11n7pq-20pq+13pq-pq
11a2b+7y2z+9a2b+8y2z4z-5z2+9z+18z2-2
1875
—z+—n-—n+—z20n2+5xy+5n2-5
2727
1
—xy-4z+4xy8pq+3x2y+15pq-18pq
2
8f+3f-5f5x-8d-3x+4d
6a-9d-4a+8d-15a+18d5xy+10xy-18xy+xy
11x2y+4y2z-28x2y+6y2z5t-4t2-4t-7t2-4
4175
—x-—t+—t+—x4n2+8xy-3n2+4
5757
8
—mn+4m+6mn7mn+6x2y+3mn-25mn
7
3a+4a-5a5z-2b+3z+5b
9a+5n-17a+18n+14a+11n7ab+3ab-13ab-ab
20x2y-6b2c+10x2y+4b2c4y-8y2+2y-6y2+6
3175
—z+—t-—t-—z10x2-4mn+3x2-6
2727
1
—xy-8z-3xy7xy-13x2y-15xy+5xy
5
6e-9e-7e9y-7b+8y-2b
4m+2n-9m+10n-17m-18n2xy-2xy-15xy+xy
7a2b+3b2c-8a2b+7b2c6n+9n2-5n-17n2-2
1775
—m+—t-—t+—m19n2-7xy-3n2-2
3838
1
—mn-3n-8mn2xy+12a2b+11xy+2xy
5
3c+4c-7c10y-2c-7y+5c
6b-4c+19b-12c-10b+10c6xy-5xy-17xy-xy
11a2b+8b2c-6a2b+6b2c7m-6m2-2m-8m2-1
2675
—z+—t+—t+—z6n2+7xy-2n2-5
3737
3
—ab+4x+6ab2ab-19x2y+7ab+26ab
4
5a-7a-5a10n-2c+3n-3c
4b+3d+11b-17d+16b-20d3ab+17ab+14ab-ab
10x2y-8y2z-11x2y+7y2z5n-8n2-2n-10n2-6
1675
—x-—n+—n+—x4y2-6ab+9y2-6
4747
5
—pq-6m-3pq2mn-10a2b-20mn+2mn
4
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