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1、四则混合运算练习48X ( 32-17 ) +30( 29+544+34 ) X102540+ ( 30X15+50 )(564-18X24 ) +12(75+49 ) + ( 75-44 )4904-(2104- ( 750+25 )576+ ( 33+15 )6X58- ( 174+89 )25 X ( 22+576+32 )( 736+16+27 ) X1884+ ( 8+6 ) X2902-17X4542X 169- ( 78+35 )(87+16 ) X ( 85-69 )680+21X15-360540 + (3+6) X272+960+ ( 245-165 )175- ( 49+
2、26 ) X23180 4-36 4- ( 12+6 )75X12+280+359724-18+35X19文档26X ( 304-286 ) +397564-4X ( 56-35 )36+300+12848-8004-16X12(132+68 ) X ( 97-57 )972+ ( 720-21X33 )450+ ( 15+10 ) X3(45+38-16 ) X24500- ( 240+38X6 )64- ( 87-42 ) X15(7100-137-263 ) 4-100250+240-r 8X5840+40+40X40960-7204-8X92400+1200+ ( 6004-15 )5
3、20+22 X ( 15+45 )160+7404-20-379004-2X ( 320-290 )492- ( 238+192 ) X26972- ( 270+31X9 )196+ ( 84-12 ) X57100-137-263+300675-600+15X127204- ( 187+18 ) 4-4114X ( 845-245 ) +12668- ( 132+245 ) +9712X ( 76+57 ) 4-19840+ ( 320 + 80 )(28+32 ) X ( 90-40 )4804-4X ( 50-40 )600- ( 165+35X3 )文档724-36+29X3320-5
4、0X4+2512 X ( 34+46 ) +32(53+47 ) X ( 86-24 )720+34X18-340(120-54 ) X ( 42+98 )203- ( 25+75 ) X16380+240+ ( 36+3)120+2420+4900+ ( 120-20X3 )7684-8X ( 76-68 )130X ( 600-235 ) +73115-15+20X3115 ( 15+20 ) X3(440-280 ) X ( 300260 )14X ( 860-260 ) +1532X18540+45(900-16X35 ) +34840-r15X (3228 )909-36 X (350 + 14 )(300+180+5 ) X12文档600+ ( 30-10 ) +54904-(2104- ( 360+12 )724-2X ( 105-87 )240+15 X ( 351-347 )480+ ( 60+10X2 )6404-(140-? ( 630+9 )368- ( 132+129 ) X34