小学数学计算练习题提升计算能力四年级下学期估算练习题21每天一练.docx

小学数学计算练习 四年级下学期估算练习　2023/02/10班级：　　　　 　　姓名：　　 　　　　情况：100×_________≈2800252÷_________≈0_________＋246≈3002＋_________≈200118＋_________≈200112＋_________≈200_________×241≈49200_________÷17≈0_________＋72≈100127＋_________≈200_________＋60≈200_________＋263≈500_________＋48≈200_________÷61≈0_________－55≈100110－_________≈100_________－43≈10098－_________≈10092－_________≈100_________×24≈2000_________×140≈28100_________×134≈26100_________×128≈24200183×_________≈22300177×_________≈20500_________×110≈18800_________×104≈17200_________×98≈15600_________×214≈58900269×_________≈56000_________×202≈53100_________×196≈50400_________×190≈47700245×_________≈45100239×_________≈42500_________×294≈6850049＋_________≈30043＋_________≈30037＋_________≈300_________＋269≈300_________＋263≈300_________＋257≈30013＋_________≈300129＋_________≈200228＋_________≈500117＋_________≈200_________＋50≈200_________＋44≈100_________＋38≈10093＋_________≈10087＋_________≈100203＋_________≈300_________＋136≈300246－_________≈200124－_________≈100_________－57≈100112－_________≈100106－_________≈100100－_________≈100_________－33≈10088－_________≈100_________－82≈100198－_________≈100_________－131≈100_________－125≈100_________－119≈100_________－112≈100_________×106≈17700_________×100≈16100277×_________≈59800_________×210≈56900265×_________≈54100_________×198≈51300253×_________≈48600_________×186≈45900241×_________≈43400235×_________≈40900_________×290≈15100_________×284≈1310040×_________≈1110034×_________≈920028×_________≈7400_________－120≈0105＋_________≈20070＋_________≈100186＋_________≈300_________＋119≈300_________＋113≈300168＋_________≈300_________＋101≈300_________＋95≈300150＋_________≈200144＋_________≈200260＋_________≈500_________＋193≈400_________＋187≈400242＋_________≈400_________＋175≈400_________＋169≈400_________＋163≈400218＋_________≈400272÷_________≈0240－_________≈200_________－234≈100_________－228≈100_________×44≈460099×_________≈380093×_________≈3000_________×26≈230081×_________≈160075×_________≈1100_________×8≈60063×_________≈3200127×_________≈1700_________×173≈40500228×_________≈38100222×_________≈35700_________×155≈33500_________×149≈31300_________×143≈29200_________×137≈2710015×_________≈3800_________×246≈2000_________＋234≈500289＋_________≈500283＋_________≈500_________＋216≈500_________＋33≈30088＋_________≈10082＋_________≈10076＋_________≈100_________＋3≈100_________＋296≈40052＋_________≈300149＋_________≈200106＋_________≈200_________＋39≈10094＋_________≈10082＋_________≈100115＋_________≈200_________＋47≈200_________－65≈100_________＋62≈20028＋_________≈30022＋_________≈300_________＋77≈200_________＋71≈200_________＋65≈200_________＋59≈200114＋_________≈200_________＋47≈200_________＋41≈100_________×2≈100_________×118≈21100_________×112≈19400155×_________≈14600149×_________≈13100_________×134≈19200133×_________≈9600_________×66≈8400_________×60≈7300115×_________≈6200_________×48≈5200103×_________≈430097×_________≈3400_________＋29≈100_________＋145≈400_________＋139≈300_________＋133≈300_________＋127≈300_________＋121≈300274×_________≈3300260＋_________≈500225＋_________≈400_________＋280≈300_________＋274≈300_________＋268≈300_________＋262≈300_________＋256≈30012＋_________≈300_________＋244≈300_________＋61≈4008×_________≈2400300－_________≈100_________＋233≈500288＋_________≈500282＋_________≈30081＋_________≈10075＋_________≈100_________＋8≈100_________＋2≈10057＋_________≈200173＋_________≈300_________＋106≈300_________＋100≈300_________＋94≈200_________＋81≈200_________－11≈200_________－5≈200298－_________≈100_________－231≈100_________－225≈100280－_________≈100_________－36≈20091－_________≈100_________－23≈100_________×17≈130072×_________≈800_________×5≈30060×_________≈17900。