初一数学上册合并同类项专项练习题31.docx
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初一数学上册合并同类项专项练习题31
8b-7b+9b3t+7e+4t+6e
4m+2n+19m-15n-15m+20n4mn+16mn-19mn+mn
16x2y+7b2c-13x2y+6b2c4t+9t2+7t-11t2-5
6175
—x+—t+—t+—x9m2+2xy+6m2+1
5757
1
—ab-5n-4ab2ab-11x2y-12ab-6ab
2
5a+6a+8a8x-9b-8x+4b
3a-2d-10a+19d+16a+19d6ab-15ab-18ab-ab
22a2b+7b2c-5a2b+9b2c8x-3x2+9x+10x2-6
3175
—z-—t+—t-—z20t2+9xy+5t2-5
2727
6
—mn-2t+6mn4mn-11a2b+14mn-30mn
7
9a-9a-3a9t+2d+6t+6d
2m-9d+19m-7d+13m-17d2ab+13ab-10ab-ab
13a2b-7b2c-26a2b+4b2c9z-2z2-2z-7z2-7
1175
—x-—n-—n-—x13x2+4mn-4x2+6
4747
1
—xy+4y-6xy3mn+7a2b-20mn-11mn
4
2c-8c+8c5n-4f+8n-9f
7a+7d-3a-8d-12a-16d3xy-15xy+11xy+xy
28a2b-9b2c+11a2b-4b2c2m-7m2+4m+16m2+1
1175
—x+—y-—y+—x14x2+6mn+5x2-4
5858
1
—pq+7n-9pq3mn-9x2y+19mn-10mn
7
6d-5d-7d5x+2a+9x-10a
2a-4d+11a-8d+14a-10d7xy+9xy+19xy-xy
29a2b-6y2z-29a2b+5y2z2x-7x2+7x+11x2+7
3775
—z-—t+—t+—z7m2+7ab-8m2+5
4848
3
—mn-7n-5mn8ab+3a2b-17ab+13ab
2
4b+4b-8b4x-7b-5x-4b
8m+2c+7m+17c+12m+10c5ab+14ab-18ab+ab
15a2b+4y2z+28a2b-4y2z6t-6t2+9t+10t2-5
4175
—x+—y+—y+—x14z2+3xy-8z2-7
3737
1
—xy-4x-5xy8pq-18a2b+15pq+4pq
4
3d+3d-3d3m-8e+8m+4e
3a-8n+7a+5n-13a-16n6xy-18xy+12xy+xy
23a2b-9y2z+21a2b-6y2z5m-8m2-7m+3m2-3
1675
—x-—n+—n+—x16y2+4ab-2y2-5
3737
1
—mn-6n+7mn3mn-11a2b-17mn+13mn
6
3c+3c+3c5y-3f+5y+7f
5a-6n-7a-17n+19a-11n8ab-18ab+10ab+ab
7a2b+5y2z-23a2b+2y2z5t+9t2-5t-3t2+1
1175
—z+—t-—t+—z16n2+8ab+3n2+6
4646
1
—pq-2n+3pq9pq-19a2b+16pq-6pq
2
3c+3c-5c4m-5a+9m-6a
7b+9n+7b+17n+11b-20n6ab+15ab+12ab+ab
18x2y+7b2c+5x2y+5b2c9x-3x2+3x+6x2+9
3175
—m+—n-—n+—m20z2-2pq-2z2+7
4646
1
—pq-3t-4pq8xy+13a2b-12xy-4xy
5
9b-9b+2b9t+3d+9t+10d
4a+9n+5a+3n+19a-20n2xy-13xy+16xy+xy
14a2b-5y2z+27a2b+2y2z8z-9z2-6z-3z2+4
2175
—x-—t-—t-—x17t2-5mn+9t2+6
3636
1
—mn+3z-5mn9mn-12x2y+14mn-17mn
3
4d+9d-6d10x+4f-7x+7f
4a+3n+9a+2n+15a+13n7xy-9xy-15xy+xy
28a2b+2b2c+16a2b-3b2c8t+5t2-9t-4t2-5
1175
—z+—n-—n+—z19z2+4mn+2z2+5
5757
1
—pq-7y+5pq8xy-7a2b-12xy-7xy
2
2e-7e-5e10n+6f+8n+5f
2m+9c-5m+18c-15m-11c9pq+3pq+19pq-pq
23x2y+4y2z-25x2y+3y2z9y-8y2-3y-12y2+8
1975
—x-—n-—n-—x18y2+9mn-4y2+4
3838
1
—mn-3y-8mn3pq+17x2y-13pq+22pq
8