四年级口算题1.doc

四年级下册数学口算练习题72－45=??????????360－85=???????????720÷45÷2=???????????50×50=32×30=???????????22×30=??????????????6×201=??????????????25×40=17×5=????????????4×60=???????????????4500÷900=???????????150×20=?170+90=??????????4800÷40=???????????14×201=??????????????254+99= 80÷16=???????????4200÷20=???????????2500÷50=?????????????25×4=16×5=????????????32×20=??????????????67×4=???????????????62+18=???????????????125×6=???????????48×25=?????????????780÷20=?????????????12×40=3000+200=????????48×125=????????????35×8=???????????????320×2=80－4=???????????420÷35÷2=??????????25×32=??????????????720÷9÷4=15＋22=???????????4500÷45=???????????521－305=?????????41－23=45÷15=???????????78÷2=??????????????45×12=??????????????630÷90=6×85=????????????69÷23=?????????????67+25=??????????????9600÷30=710－420=????????50×90=?????????????22×8×5=?????????????624－198=560÷35÷2=????????2400÷40=??????????3600÷60=?????????????87÷3=　12×5=????????????6300÷30=???????????690－420=???????????45+45=102+284=?????????480+290=???????????930÷30=????????????7000÷70=23×3=?????????????800×30=????????????2100÷70=???????????375+99=612÷12=???????????360+140=??????????1800÷30=???????????45×6=880÷20=???????????45×14=?????????????3×90=?????????????41－23=25×16=???????????48×9=??????????????696÷3=???????????????26×20=?32+15=????????????28×7=??????????????40×60=????????????25＋40=32×20=????????????468+197=???????????6×80=?????????????3500÷25÷2=4700÷10=??????????729+301=???????????45－18=???????????67+28=2400÷20=??????????25×6×4=????????????25×28=????????????5600÷1615×6=?????????????125×48=????????????125×16=???????????2800÷25÷??