七年级上册专题练习去绝对值符号、实数运算

七年级去绝对值符号实数运算专题练习一填题共1小题）a二解题共小题bc+2||ca|2cbc|+|b|+|bcbc+1||ac|1c+a|+|b|+|am+mn2|+n

|1

+

20193322017201320133+20193322017201320133

11+|1

mmnbx4x1+mnabx+a1b2a0+0aa|3+bba|+|2bcb|+|a1a|+|baca|+|2bb+21|17xbx50b|a|b|a|+|cb

ab0a|b|a|a|bc|ba|1|+|1+2ca|cba+a|+|bcx+1|+|4xa1a0cb2b+b|a|+|+|caa|+a|+|b+|++1|2|3|+|y|+5

220192a|+b|+||+|bc220192aba+1|bc1aac2+1||cb1|+|3++0b1c1a+2bcb+

5

2|+

+

+

x+1

2222

2

2.

2x15+2632+

34

+

七年级去绝对值符号实数运算专题练习参考答案试题解析一填题共1小题）abaaaa二解题共小题bc+2||ca|2cbcb0c+bc2c+bb|ccbca+0ca0cabc+2cca+b2c2+c23aabc|+|b|+|bcabc

a01a+0c0+++bca++b+b+bc+1||ac|1cb0ca+0a0cbbac1+c+a|+|b|+|a0abaa+0+0+a++bbam+mn2|+nm+nmnmm+n0+|+|nmn|mn+2m+

20193m++2201933m23aa

3+223|1

+

+21+

15

11+|1

3220173220173220173220173220171+32201732201732201732201732201722mmnbx4x1+mnabx

m+01xmnax4+n01x24x6x6++ab66143xxm+abx+2+1+ab1x62a1b2a

aab3+bba|+|2a+ba2101a2a0abb0baab0ab032b0++a2a++b2b0

201320132013201333201320132013201333bcb|+|a1a|+|b0baca|a1

cbcaabc2|+|ab|+|cb1+0+12aba0b0caca|+|2bb+21|17xbx5c|+6|ab|5b+24b9c|+6|bcb1|17c+6a6b+2cb+214ab9x1bxa+334ab395ab90b|a|b|a|+|cbcabc0cbc0

b||b0a+0+0+++a+b++aab0a|b|a|a|bc|baa+cbc0a0c0ab0abaac0ba|acbacb+baa|1|+|1+2x+101x0xxx+21x02x+1+32+1xx3xca|cba+a|+|bccba0ab0c20ca+ac2c0x+1|+|4x

xxx1++4xa1acb2b+b|a|+|+|b0|ba+b02aca+bcc|b+b2ab|+caba++bcbca+2caa|+a|+|b+|+acab+0c0c0+++b0+1|2|3|+|y|+5

0x+1|+1xyxx+1|2|3|+|yxxy+1+2yx3yxxyy26++50a|+b|+||+|bca1b0ca|aaca++a+a+2aba+1|a02aabb+1|a2+a2++1a1bc1abc2+1||cb1|+|3++0b1c1a+2bcb

222222019bc2222220192bc+1|c|+|b1|+|ba3++1c1b+cb4c1aacccabcc21aa+1|cb1|+|baab2a3++23++011c0b1ab1cbcb+2ab+2+2b4+2bc+3b+3+3+46+

51+8+5+2142|+++

222245533|

52+201935+23

1++

2x12272

2+127

2122x+12122x+1x0.8+2.8

7