四年级下数学七大类型简便计算狂刷题

一、必背知识点:运算定律及性质二、四年级下册数学简便运算专项训练④25x(79x4)580025636x78+3622349x25+2551q150=[90(67-52)]r1/15r①125x32x25735-35-65②72x99+72q145x(100-1)①125x45x8233x71+33x29q72-2x85135x99+135753x5①4x2x52903-176x52/1537x(162+354)④521+78-293①25784225x(40+4)36x72+28x6q640-(96-80)x45158+286+42+1146105x12-635)25①17x4x252125x19x83/15①54+99x99+4529g9x222+333x334①68x101274x201③256x1002④154x601③98150+19=50④22751354/15①220x3572720x4/15r③22515:154120=(10=8)①25x99x42125x76x8479x44+79x56879-432-68①2x785x52312x24+256③13x99+1316照样子做巧算5/15 39+27①49+48=39+1+26 ①21-25+29①21-25+2925+18-15=25-15+1836+25-1632-28+38①158+262+142+13825x32x1253178x101-178④7300=254①128x34-28x34268x99③7000=8125r6/15rq13.7+0.98+0.02+4.3588x125③45x125-125x52910126-(96+17)]④(29+38)x(100-53)①400-1300=65+25②102x457/15①125x8832x99+32396+12+49x8q125x32x254.4+3.8+15.65.62-7.9+2.38-2.171500=2545.36+(83.4-15.07)9540=[(41-36)x18]①3.27+6.4+2.73+4.6296x45-34x96-96r8/15r332x125x25④289-(89+1080=36)①25x32x125②488+137+④25x4458856+44x885445①721+16+184218x125x8r9/15rq225-600=8-25575+25x96150x[(153-3211]①125x722101x3③99×38+383200=425①24.75-4.96-6.752u80+19x(106+74)]=-60387x47+53x8732x2512.64-(2.75+7.64)③45x63+55x6328x26x125136-32-689l 47+47531o26421-175-25 rr3528x78+472x78④57x101-57①66x103-66x32125x88③1900+254q2700-425-17541+127+59+173656x99+56①3600=42567+263+33③88×1254163x59-59x63①23x99+23②16x(300-120)200=8x40①74+157+126+243836-269-131389x101477x99+7754800=520125x32x25①102x45273x99+73④6500=2542·810=37+639=42100=5x6=10=89-23-17=12312x3=120=4x3=①480=(20-4)×80432x125x2525600=425512.6x101-12.6567-186-14158-i(27+54)=9]①355+260+140+245237x56+63x56a968-52-48④48x125①800-13862217x23-23x7388x1①125x103-125x341+127+59+1731300=254rr449x99+49525x36x4