人教版七年级上册数学易错题集及解析

1/161A55B33C1010D55A101012AB32C33D32ABC3D2B1AB0CD3.14A0B0C3.14DC020000A4B3C2D102002200402/1602004A03ABCD00A00ABBC0CDD04150300.15128+202.6150.15+20301282.615030128+200.152.63/16150.15+20301282.615030128+200.152.6012009?1cm0cm15cm3.6xA9x10B10x11C11x12D12x130x3.6x3.6=15x=11.4C=212A1B3C2D131211212=31+2=1D312004ABABA20022003B20032004C20042005D2005200612004ABAB20052004AB2005AB2004C4/164A+2A5A5B5C7D73A522+5=725=3D5AB21CABCA0.5B1.5C0D0.5AB21AB=12=3CABAC=CB=AB=1.5A1.5CC2+1.5=0.5AABx1x2ABCx1+x226M4M2NNA6B2C6D62MM4M41M4N4+2=62M4N4+2=2N62D7ABCDEAB=BC=CD=DEDA10B9C6D0AEAB=BC=CD=DEDEDAE=146=20AB=BC=CD=DEAB+BC+CD+DE=AE5/16DE=AE=5D145=9BAE8AA74A3Axx+74=0x=391112223153ABAB9ABA3.5B5.5111223111ABAB9AB14.512232A3.5B5.510AB1BACC2BABCA6/16BA1+CA1+CxAC1x=1+x=2CBACABA111.531.531.537/1612AOBCD302.5561OB2.52AD33CB2.54Amm0Bnn0mnABnm1BO|2.50|=2.52AD|36|=33CB2.54AB|mn|=nm1|a|=3a3a2|a|=3a=3002x3|y|=5x+yA8B2C82D82xyx+yx3x=3|y|=5y=5x+y=3+5=2x+y=35=8x+y82D003=1aAa0Ba0C0a1D1a08/16=1|a|=aa0a0B004|2|2|2|=2|2|=2|2|2|2|22005a|a|=aaABCDaa|a|=aaaC006ab0++A3B1C13D31abab0abab++=1+1+1=3ab++=11+1=1D9/1600ab1Aa-2Ba-1CabDb2a-2-101b2Aa-2Ba-1CabDb2A21-2.5-4_______1-2.5-4-12.541-1-2.52.5-44-12.541abca+b+|c|A1B0C1D2abca+b+|c|a=1b=1c=0a+b+|c|=11+0=0B1101|a|=3|b|=5ab0a+bA8B2C88D22aba=3b=5ab0ababab|a|=3|b|=5a=3b=5ab0aba=3b=5a+b=35=2a=3b=5a+b=3+5=2D002abc|ab|+|b+c|+|ca|=2aab0b+c0ca0ac0bab0b+c0ca010/16|ab|+|b+c|+|ca|=babc+ca=2a12005913+811A205B204C195D194200+=195CD2ABC100.1kg100.3kg100.2kgA0.8kgB0.6kgC0.4kgD0.5kgA0.10.1=0.2kgB0.30.3=0.6kgC0.20.2=0.4kgBC0.30.2=0.5kgD3963249+6+39+63=2496324004ab|ab|=6b1=24aba+b=0abb|ab|=6baba+b=0a=bb|ab|=6b=3b1=2b|ab|=6b=3b1=42411/165181116117721453612384221711=727721453+6=1231238+7+3+3+1=223226400855+23+2+12102375558=40+2+3+2+1+2+1+0+2=358+3=373714A16B0C576D1440123412340B4002A1B3C5D1350135D3320012/1632210122+1+0+1+2=021012=04234512=34=122345=34=12121aAaBCDa1aB20.50.520.510.50.50.52=10.520.50.5031010001113/16AB=C1.2D.AB0CDA==BCDD14/1621618ABCD=1616=241818=24C=1A0BC1DA0BC000001DC00212005A1B1C2005D200511120052005112005=1A111115/16323+3A0B2C16D1623+3=8+8=0A04ABC1D110101DD11115a3=aaA0B1C2D3011a3=aa3a=0aa1a+1=0a011D1106ab1030A0B0Ca0b0Da0b0ab0ab0abab103016/16ab0ab0abab