初一数学上册合并同类项专项练习题20.docx
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初一数学上册合并同类项专项练习题20.docx
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初一数学上册合并同类项专项练习题20
6e+3e+7e3z+5f+9z-4f
2a+2c-16a+10c+10a-11c3xy+7xy-14xy-xy
16a2b+3y2z+20a2b-2y2z6y-9y2-8y-6y2-3
2775
—x-—n+—n-—x18n2+6mn+7n2-9
3636
5
—pq-5y+9pq4ab+9a2b-14ab+7ab
6
6c-4c-4c3m+8e+9m+4e
9a-8d+14a+3d-19a-12d3ab-5ab-20ab-ab
7x2y-9y2z+18x2y-2y2z8t-3t2+7t+12t2-3
3175
—x-—t+—t-—x2x2+9xy+2x2+4
2727
1
—ab-8x-4ab4pq+8a2b+15pq-29pq
2
7c-3c+9c4t-6e-2t-2e
8a+4c+13a-7c+15a+13c7xy-10xy-13xy+xy
28a2b+3b2c-4a2b+3b2c4y+3y2+7y-10y2+1
4675
—x+—n-—n-—x15t2-8ab-4t2-1
5757
1
—ab-7t+3ab5pq+3a2b-18pq-3pq
4
9e-5e-3e6z-9f+9z+5f
8a-7d-9a+12d+11a+15d7ab-17ab-16ab+ab
18x2y+5b2c+17x2y-6b2c8n+5n2+7n+5n2+5
1175
—m-—y-—y+—m17x2+9ab-6x2+7
5858
3
—pq-3t-2pq4pq+16x2y-11pq+2pq
2
7a+4a-6a7n+7c-8n-4c
8b+7n-13b-3n+16b-18n8xy-14xy-13xy-xy
4x2y+9b2c-27x2y-7b2c8y-4y2-7y+18y2+4
1175
—m+—y+—y-—m13x2-9ab+3x2+9
3636
1
—pq+4z+7pq5mn-18x2y-9mn+5mn
5
6f-9f+4f8z-4b-7z-4b
5m-2d+20m+19d+15m+13d3ab+10ab+13ab+ab
11a2b+5y2z+6a2b+7y2z7y-6y2+9y-2y2+7
5175
—m+—n+—n+—m8t2-7ab-7t2-1
4747
1
—pq-9n+3pq7mn+20x2y+16mn-26mn
6
6c+2c-2c3z+8b+9z+7b
9a+4d-4a-11d-16a-16d8pq+17pq+18pq+pq
25a2b-8y2z+20a2b+8y2z7m+9m2-6m+14m2-8
1775
—m-—t+—t+—m6n2-8pq-8n2-5
3636
6
—xy+6y+5xy3mn-7a2b-4mn+25mn
7
6a-3a-6a8x+3f+6x-7f
6m+3d+5m+16d+19m+16d2mn+10mn-20mn+mn
23a2b-8b2c+6a2b+9b2c4z+4z2-9z+6z2+3
3175
—z+—n+—n+—z6x2+4xy-3x2+1
2727
5
—pq+9y+9pq7mn-2x2y+9mn-12mn
4
3f+3f-2f4y-6a+2y-2a
3b+8d-17b-10d+20b-19d8xy-14xy-15xy+xy
24x2y+5y2z+24x2y+7y2z4x-7x2+3x-15x2+3
2175
—x+—n+—n-—x16t2-5pq-5t2-3
3737
1
—xy-4m+9xy4mn-15x2y-14mn-8mn
5
9e-7e+6e7t-8c-8t+3c
7b+7d-14b-10d+11b-10d8xy-20xy-13xy-xy
26a2b+4b2c+13a2b+3b2c4x-6x2+9x-14x2-3
1175
—m+—y+—y+—m4x2-6pq-7x2-4
2828
1
—pq-4t+4pq6pq-20x2y+11pq-10pq
6
3f-3f+7f6z+2d-6z-3d
7a+5n-4a+8n+14a-18n2pq-18pq-10pq-pq
13a2b+4b2c+28a2b+3b2c2z+3z2+3z+18z2+4
5175
—z+—n-—n-—z14z2-3ab+5z2+9
4747
1
—ab-8y+2ab7xy+18x2y-6xy-7xy
6
6a+9a-9a3m+3a-5m+2a
6b-2n-20b+8n+16b+17n9pq-18pq-17pq-pq
12a2b-5y2z-6a2b+6y2z3x+4x2+8x-8x2+6
1775
—z+—y+—y-—z15m2-7ab-9m2-6
4848
1
—ab+6m+9ab3mn-8x2y-9mn-21mn
3
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