專題27整式的加減及化簡(jiǎn)求值大題專練(重難點(diǎn)培優(yōu)30題)-2021-2022學(xué)年七級(jí)數(shù)學(xué)上解析版人教

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班級(jí)：______________

得分：_________________本試卷試題共30題．答卷前，生務(wù)必用0.5毫米黑色簽字筆將自己的姓名、班級(jí)等信息填寫在卷規(guī)定的位置．一解題共30小）14a3b+ba12+6abab[3b21abab]ab22a3b+2+5aa+12bbaab2aa1b112abab+ab21abab]22abab+6ab32+2ab+42abab+6ab3ab+22abab2+221+20213b3aab23+x3xx26ab12a+22

2222222222221112222222222222222222222222222222222111222222222222222222222222222222212a1723x35x+3+5xyxyx1y2+10y10xyxy10x

xy

+3xyxy1x110110+5150

552242ab+2ab1[3ab1ab1b2ab+2ab13abab2b+2ab13bab+1b21125xyx2x3x5

yxy3

y+6xyx32

22222222222222222222222222222222222222222222222222223223260

2615ababab+3ab22mn3mmmnm+2]215abab3

5+4ab12

b2mn+6mm+5mnm2mn7Ax6B7811aA3B2ABxa22ABxa02x6ax+3B7x8aB2ax+3+21x+323x6+623x+6226+3B78x1+26+37x815x6xA+Bx6+8048ABA3

mx+1Bnx

+3x+21A+2Bxm+2n3A+7mx0

?42222222222?422222222?42222222222?422222222mn62m3x+1nxxm+23+m1nxx3mnxxmx+4m+1+2x3+20+53nmn5

32

6.522m+7n3m+1xx+2mmx+13+76xmx1236679A2aab21a++214A3A2ab2ab32+2A2

+3ab21Ba+aab21+2a+ab+22ab212+2+4

5222222222222222222222222a15222222222222222222222222a1235ab225ab+3a52b2101a+25ab2x7x22

x235a2b+2722x1x72+24x+13x1Ax+4xBxx212A+2AABA2AAB5x+4+1x2A+B5+4x+1xx210x+8+2+2xx25Bxx2B5x+12xx25

x+1x6+432123xy

1x2

2222﹣2a1b232222222222222222﹣2a1b23222222222222222222222222121ab2a23+25aab2b1xyxy2221b31b25234ab+b556bbab+81b242+811613x3yx3xyy12B2xy1M2y2x3xyyxxy3262yxyyx3y2xy14+6+111??14abb3+ba+23??213

2112??122222222222222222112??1222222222222222222111abb3??????3aba+2b2??23bab2

??1bab223+2b2215Axx+1B5xx+312AB2ABA2AB4x5x+32A34x+135x+38215+39xx72A4x+15xx+34+15x+xxx016

2222222222222222222222222222222222222222222222222222221y+x+425a+5a22aa]2+5+4y7+25a+5a22aa]5aaa+26a4a17A2x4A2B+2x+8x102B2xx4+25+8x+8x102245+810x6+8x2Bx222x4x24x+8x+618ba1131xx3

12a23x+2[34xb2ab2113+2a1311x15b225x35x31

2222222222222222222222222222222222222222222222222221x32a1a2x+b[34+2]abx3x++4+2xx4+2x3x3xx62ab119A3y5+x+7+BA+x+1291AB23yAB+223BAB4BxA322401Bxy5x+7Bx+122x+AB6xy29+23y5x6xy29+610+1412x+2+52A3BA4B12x+2+543y5xy12x+2+512x+202822xy423y4xAB2240220A3a3+41B

ab+abc+4

b

8522222222222222222228511222582222222228522222222222222222228511222582222222222222222113c22ACACA2ABA3abA2A4

b3ab

+4abc23

2

2+4

b3ab

+4abc6

+4ab2a++2abc2223b2+a+abc6b4ababc+2abab28b5ab3c11b18abab580

221aa+aa+30a+85aa5aa+30aa351+2+a18aa510a5a+8a+30aa+8

212222222222222222222222222222227222212222222222222222222222222222227222252451922kk1k1kk1k2k1kk1k122k441

+kk3

12

12233ab+2ab1b23aab4b3ab+b2

25b5ab1b21251210201024Axx+2B2xxy123B62xxy1A3B2x+yB23+243x3+62y8x+9+33

76712222322222232222222222222276712222322222232222222222222222222227+7y62xy12A3+77x+yxy711725abab3abb3abab2+6abb3ab91b31×33

13

39

19

3926abab2+32+ab1aab2b+4ab6+3ab6b2ab22ab3b2b1221]22627x2+x43+ab2ab++b42+13ab1abababab2x21x6y53

222222222221311222323323222222222221311222323323a22c5cd9+2d22x6y53x3+2bca+cd+bab﹣5ab＝3aab23653xy521153+bdabd2++d+2c2b225281a35bb22x2y+xy222b+3+6106+2b1b2132

123233

2+y2x223