初一数学上册合并同类项专项练习题68.docx
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初一数学上册合并同类项专项练习题68
6f+3f+4f10x+2f-2x+10f
2a-5n+7a-8n-11a-18n4pq+11pq-20pq-pq
13x2y-5y2z-27x2y+5y2z6z-7z2+4z+18z2+2
1675
—x+—y+—y-—x19z2+3pq+9z2+5
2727
1
—xy+4m-5xy3mn-12x2y-17mn+20mn
6
4a-6a-4a5z+3b-7z-3b
6m-9d+17m-12d-10m+13d4xy+6xy+18xy+xy
14x2y-8y2z+23x2y+8y2z9y-2y2-7y+11y2+9
1175
—m-—t+—t-—m20t2-7xy-8t2+1
5858
1
—xy+6z-3xy8ab-16a2b+13ab+21ab
7
8a+4a+9a10t+5f-3t+6f
9b-8c-20b-12c-18b-13c3pq-20pq+15pq-pq
9a2b+4b2c-26a2b-8b2c6z+5z2+9z+15z2+3
1575
—m+—t-—t-—m13t2+6mn-6t2+3
4646
1
—ab-8t-7ab6ab-3a2b-10ab-27ab
4
5e+2e-5e8m+4e-3m+10e
9m+8n-16m-4n+20m+11n3pq+5pq-13pq+pq
6a2b-7y2z+26a2b+5y2z9x+9x2+3x-14x2+2
2175
—m-—y-—y-—m16t2-8ab+7t2-8
3636
1
—xy+7y+7xy8pq-14a2b+10pq+14pq
7
5f-8f-6f8n+9e+6n+8e
7m-3n+13m-10n+16m+17n2mn-6mn+10mn-mn
20x2y-4b2c-9x2y-3b2c2t-5t2+3t+8t2+2
4175
—m-—t+—t+—m16x2+8xy-8x2+4
3838
7
—ab+8n+3ab8pq+15x2y-19pq+18pq
8
6f-3f+3f4t-8f-4t-10f
8m+2c-2m+18c-20m-11c7xy+14xy+19xy+xy
27a2b-5y2z+26a2b+8y2z7z+3z2+6z+3z2-3
1175
—z-—n-—n-—z4y2+4pq-7y2+2
2727
1
—mn+8m+5mn3pq+18x2y-11pq+26pq
7
5d-4d+9d4z-6e-5z-5e
6b+4d-13b-14d+20b+18d8xy-4xy+14xy-xy
23x2y-9b2c+2x2y+9b2c6n+6n2-4n-11n2-9
2175
—x-—n+—n-—x19y2+3pq-8y2-9
3737
7
—mn-3t-2mn8ab+2x2y-15ab+11ab
8
2d+3d+5d6x-6e+7x+4e
8m-9d-18m-5d-20m+12d3pq+20pq-13pq-pq
16a2b+2y2z-3a2b+7y2z6y+9y2-6y+5y2+8
1175
—z+—t-—t-—z17m2-6mn-9m2+4
4747
1
—pq+8y-6pq7ab-11a2b-2ab+22ab
3
8e-7e-9e5x+2a+2x-9a
9b-7c+13b-12c+11b-18c9xy-10xy-16xy-xy
20a2b+7y2z-9a2b-9y2z2x+8x2-9x+16x2+2
2575
—m-—y-—y+—m3y2-7xy+8y2+8
3636
7
—ab+4z-2ab5pq+4a2b-9pq+5pq
8
9a-4a-7a10n-5b+7n-7b
3m-9n-19m-19n+17m+17n2ab-15ab-11ab+ab
16x2y-5b2c+13x2y+4b2c9t+8t2-8t-7t2-3
4575
—z+—y-—y-—z8n2+3ab+7n2-1
3636
1
—pq+8x-2pq5mn-8a2b-10mn-10mn
5
2d-3d-8d9x-2c-6x+10c
4a+7n-16a-12n-10a+18n2mn+4mn-20mn-mn
14x2y-3y2z-2x2y-3y2z3y-9y2+7y-15y2+3
4175
—z+—n-—n-—z11z2-3mn-2z2-6
5757
1
—xy+9x-9xy8ab-5x2y-14ab-9ab
2
2c-4c-8c7m+9a-3m+8a
6m+7d+17m-11d-12m+18d2pq-8pq-10pq-pq
14x2y-5b2c-13x2y-6b2c2t+8t2+8t+19t2-1
1175
—z+—y+—y+—z20z2-7xy+3z2-9
2626
2
—xy+4t+7xy6ab+10a2b-9ab-15ab
3