初一数学上册合并同类项专项练习题28.docx
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初一数学上册合并同类项专项练习题28
9b+8b+5b10x-7b-2x+10b
9a+9d+13a-14d+14a+11d9mn-16mn+15mn-mn
28a2b-2b2c-2a2b-7b2c9x+7x2-7x+12x2+3
6175
—m-—t+—t-—m9m2-3pq+3m2-3
5858
6
—mn-5t-8mn3ab+17x2y-18ab-3ab
5
3d-7d+6d8t-5f-9t+4f
3m-2d+16m+2d-20m+17d5pq+6pq-14pq-pq
26a2b-4y2z-19a2b-3y2z4y-8y2-8y+17y2-9
5775
—m+—n-—n+—m4n2+5xy-6n2-5
4848
1
—mn-8z-5mn8xy-18x2y-2xy+29xy
7
4a+9a+8a2n+9c+6n+5c
7m-7c-19m-7c+11m+20c2ab+11ab+15ab+ab
23a2b-4y2z-13a2b+5y2z8m-8m2-3m-16m2+8
1175
—x-—n+—n-—x2t2+6mn-2t2-4
2828
1
—mn+7z+8mn5pq-9a2b+14pq+15pq
4
2e-9e+7e10y+2e-2y+10e
7m+7d-6m-2d-19m+14d3xy+6xy-20xy+xy
27x2y+4b2c-19x2y-7b2c8z+2z2+3z-8z2+4
1175
—z-—n-—n-—z13t2+6pq+7t2+2
2727
1
—xy-9x+8xy9xy-9x2y-3xy+14xy
6
2e-2e-5e4x+2b-5x+8b
6a-9c-3a-5c+17a-15c3xy+18xy+16xy+xy
6a2b+8b2c-19a2b+8b2c9m-4m2-6m+15m2+9
3175
—x+—n+—n-—x9t2+3pq-9t2-2
4747
1
—pq+9y+9pq2mn+19x2y+6mn+5mn
2
9c-5c+9c5m+6b-2m+5b
7a+4c+4a+12c+17a+17c5mn-12mn+16mn-mn
25x2y-4y2z+8x2y+9y2z7t-7t2+6t-10t2-9
6775
—z+—t-—t-—z17n2-2mn+5n2-8
5858
1
—pq-8x+3pq6mn+14a2b+4mn+2mn
5
6d+4d+5d4x+3e-4x-9e
7a+4n-10a+15n-17a+12n5mn-19mn+13mn+mn
25x2y+8b2c+4x2y+7b2c4y+2y2+3y+20y2+3
6175
—m+—y+—y+—m10z2-7xy-9z2-1
5757
1
—ab+3m-9ab9mn+3x2y-8mn-20mn
4
7c+5c-4c10z-6f-9z-9f
9a-2n-20a-14n+18a-15n4ab+3ab+18ab-ab
13a2b-3b2c-15a2b+7b2c5t+7t2+4t+4t2-6
4175
—m+—n-—n-—m11m2-3mn-6m2-6
3838
1
—mn+6t-3mn7pq+6a2b+7pq-5pq
2
8e+3e-9e7m-3c-2m+8c
4a-8d+13a-18d-12a+20d8xy+3xy-19xy+xy
5x2y-3b2c+16x2y-2b2c3x+6x2+9x+19x2-2
3775
—x-—y+—y-—x16n2-6xy-6n2-7
2828
6
—pq+8z-2pq5pq-17x2y-15pq+4pq
7
7e-7e-3e9y+9a-7y-7a
2m+7c-6m-14c-12m-16c3mn-14mn+18mn+mn
16x2y-3b2c-25x2y-5b2c2t-8t2+3t-9t2-3
1175
—z-—t-—t-—z5z2+3ab+8z2-4
4646
1
—mn-7n+6mn8ab-7a2b-15ab+24ab
4
5d-7d-3d10z+7c-7z-4c
5m+2c-12m+6c-19m+11c6ab+3ab-11ab-ab
3x2y+2b2c-5x2y+9b2c3y+4y2+8y+4y2-9
3775
—m-—y+—y-—m4z2-3mn+8z2-3
2828
3
—mn-6n+8mn9ab+14x2y-9ab-18ab
4
8f-7f-7f7y-5b+8y+5b
6a+5d-11a-4d-10a-10d2mn+6mn-16mn+mn
21a2b+4y2z-24a2b+4y2z4t-7t2-2t+15t2-5
3675
—z+—t-—t+—z3z2+2xy+5z2-7
4747
1
—mn+3x-2mn3pq+3x2y-4pq-19pq
8