三年级数学(上)计算题专项练习附答案集锦

三年级数学(上)计算题专项练习附答案集锦228×4-625=480×2=770×9-138=600-(166+356)=180-18-24=301-(395-205)=240-52-32=244-173=304+(463-337)=104-53=347+(446-172)=402+(386-135)=202+335+742=223+139=22×9-107=65×(259-256)=817-106×4=105-15×5=582×3-786=28+400-302=997-(37+480)=158-11×5=102×9-897=913+682=768+281=12×6-44=521-225+349=386×2-312=109-12×4=124-(822-761)=985-(474+509)=72×6+182=480×(812-808)=96+295=375+251+115=146×6=400+(484-399)=942-(154+337)=384+13×7=659-163+715=441-(136+204)=835+452=190+146-247=518×(559-555)=482-28×2=108-41=690×(225-217)=590+177=108×(890-885)=62+46×7=465-(119+259)=135×(432-429)=294-(135+97)=2/7-1/7=888-283=413+32+69=970-(516-83)=500-43×8=68+253=705×8=441-(158+31)=70+167=331-(456-267)=629-82×5=470-315=521-314-155=14×4+466=120×(294-290)=537+744+882=693-249-422=118+117×6=282+(697-140)=152+395=955-(101+725)=215+191=569-(586-67)=2/8+3/8=668+(166-55)=418-(463-201)=95×3-58=596-71×4=122×(56-50)=88×2+696=781+925=255×3=305+138×5=243+762+511=386+866-891=14×5+313=858-190×3=66+398+279=622-178=126+350=562+118=738-28-686=473-(128-89)=441+626+807=301×3-106=907+555+195=696-(591-221)=133×4=177+77+435=18×(112-104)=183×(995-991)=949+443=350-47=310×2=567+110+82=625+(923-426)=460×(402-393)=65+368-150=360-(189-34)=197×7=76×(271-263)=873-190-501=103×(174-166)=136+39+169=440-99=552-(119+233)=292-155+311=54×(296-287)=727-68-207=14×(230-225)=185-17×4=136×(64-59)=298×3-430=522-267-70=919+79×8=349-(396-101)=88×2+706=486-43×9=319-308+72=76-39=672+(724-563)=787-(164-98)=832-330+408=229×(918-911)=40×3=57+220-116=155+329-105=906×5-147=233×2=899-289-235=202+(430-403)=203-179-23=569-17×6=390-225=377-33×2=898-(142+448)=278×(573-566)=307+146-339=345-213-90=777+517-683=187×5-539=414×(474-465)=946-41×4=514+293=780-381+73=169×5-34=165-(63+36)=969×4=227+128=468-243-61=224×3-432=52×(368-365)=471-(173-98)=486+192×3=656-(32+238)=577×8=708+302=640×(554-550)=471-(310+22)=161+295-374=853-62=675+136+74=1/5+3/5=669+(419-187)=382-94×2=127-(69+33)=403-(30+268)=566-143+284=545+773-586=143-(472-331)=205×4=124×2+651=116×(467-463)=493×(306-300)=226-72=381+655-286=427-88×4=609+91+85=367-303=164×2=184+297×2=246-106=395-49×6=120×5=443-317=163×2=945-860+233=477+692-431=264+544+64=648×(144-137)=646-105=323-(235+64)=96+149-49=339-(290+28)=100+236=66+135=77+150×4=787×(815-810)=164-129+307=791-648=538-69-56=971-765-96=924+657-466=76+(402-396)=344×2=960+(758-754)=427-(253+81)=625-409+824=89×6+55=315-83-60=439-33×9=78+(493-367)=794-(238+444)=923×(95-88)=70×(141-137)=337-(303-54)=81×(494-490)=668-(465+95)=246+96-295=92×(354-345)=662-407=386×(380-371)=24×(259-254)=484-101-140=429-(251+157)=440-314+172=109+34+759=316×6-847=242-(42+65)=138+51=324×8-410=90+359-131=177×2=703-(323+223)=544×7-316=243+341-285=865-116×4=756-157+53=922+424-488=465+142+160=91×8=408-164=122×4-328=26+196×3=370-(341-156)=15+284+550=256+(497-263)=378×2-739=538×4=463-268=493-67×6=96+108+721=779+82×9=181-16×3=454+(178-105)=732-40×8=112+121=889+567+783=111-32=239+45=445+43-131=161×3+362=810-160-635=442-318-91=799-262-76=664+183=444-116+65=191-172+420=214×(451-447)=29×8+60=711×(346-343)=343+139-25=357-158-187=359-12-146=437+(464-453)=250+(409-286)=275+138+261=20×(119-114)=943-(516+179)=982-(764-675)=909-697=301-43+77=937-863=236+276=132×(320-317)=123-(148-99)=291+(788-349)=534+770+683=225+75+21=325-138=126+(430-46)=750+300+490=771-100×2=83+(228-193)=356-195-118=674-561-81=311+412×2=173×(446-441)=356-219+870=733+579+506=780+(333-200)=839+256×3=273-(263-235)=49+159=258×3=894+(739-601)=441-305-45=748+979+383=218-(370-274)=668+769+679=306-14×2=222-210=399-202+203=374-16-210=748-70×2=225-(425-369)=185+613-597=238-(179-70)=618-418+205=930-773=477-222=223×6-401=27+422-106=150-146+187=910-228×2=206-40+295=598×5-30=849-(431+245)=452-58×2=841-(663-57)=403-398+131=315-205=651+88×2=237+622-333=150×4=217+539+842=53×2+347=364-(110+87)=372-(234-160)=159×(383-380)=2/8+5/8=170×9=140+696-225=89×7=363+391×2=813×7-415=310-15+68=470-(466-114)=326-49+987=559+193-688=921-167×4=965-(737+19)=503-(577-129)=943-(548-526)=503+(651-332)=928-26×2=188-(84-77)=180+(634-345)=497-104=557-111-204=180×5=480-83=40×9=385-173+231=207+538+368=848+676-342=318-145-76=877-(545-358)=651+(942-537)=369+273=652-105×3=408×7-329=91+(183-141)=245×7-673=689-(334+55)=14+219×3=686×7-450=862-(224+182)=198+106+368=489-62-300=480-(478-254)=393+58-216=292+343=102×7+460=462+89-11=311+166-189=717-57-469=980+371=443×2-61=517+(179-137)=120-115+130=170×7=235-78+57=443-321-10=160-(380-236)=326+156+453=263+759-97=514-(490-176)=37+39-18=345-10-122=201-160+364=5/9+3/9=38×6=662-68×5=257-149=3/10-2/10=502-408+838=82+654+126=807+(929-167)=830-(716-494)=892×7=307+73-134=3/6-1/6=371-(450-118)=611-49+741=517×5=112×6+253=180-44=116+333-408=535-345+791=361+(318-133)=815-242=206×9-109=50×8+298=210+217=553×(884-878)=901-125×2=232+58=674+947-913=429-(82-50)=230×2=821×6=699+724-479=391-(177+35)=460-(104+313)=132+217-283=348×3-898=46×9+812=108-10-64=669-63=214+191=288×2=394-92-153=132-(240-200)=947-831-44=245-(457-243)=479-251+163=50+120+440=914-54-349=491-(149+49)=172+(139-108)=2/7+5/7=733+81×8=489×2-164=71×(682-675)=252+(304-59)=147×3=831×7=46+821+41=406-226-154=421-(348-134)=214×2-77=349-99-25=339-(286+47)=5/7+2/7=429+926-295=282+(849-350)=566×6=201+514=500-(205+111)=325+(486-402)=534-55×8=228+(413-146)=870-57-768=287+760-437=949-156-663=388-165=80+282-45=178+436=68×7+427=90+162-145=245+68×3=128×6+327=172+148+648=640+90×4=498-(40+134)=31+683+222=1/7+5/7=189-(59+88)=566-(484-412)=999×(830-821)=436-11-111=467+156×2=130×5-98=479+50×3=101-50×2=193-56=263-40=951-(635-178)=132+960+960=806-(38+39)=219-191+376=378×2-221=704-(394+185)=388+(331-106)=3/6-2/6=978-662=337-257=30+21+569=553-110+673=155+33=250+994+344=309×8=866+722+532=296+306=681×6-229=366-59×2=218+(339-138)=659-(976-446)=924+492=121×8=98+37-115=14×8=467-(208+56)=452+986+73=108+465+113=47×(772-768)=396-(234+150)=618×8=884-577=498-38×7=638-520=135-123+64=127+531+194=382-(365-253)=68×5+591=356-(357-29)=454-(195+186)=244+103×3=363+16×4=177+33-22=276×2-376=3/5+2/5=778×8-466=31+524+124=113×4+609=254+859=664+241+572=6/8-1/8=138×5+158=6/9-1/9=237×4+868=1/3+2/3=292+180+53=280-259+134=826-(740-562)=302-(762-562)=962-721+14=941-917+716=222×3=241+(994-401)=205-147-23=855-(538-97)=923+(856-327)=399-257+19=2/3-1/3=386+(395-47)=292+79=438-(466-242)=339-(122+71)=480-(11+354)=608×(45-40)=314+114=136-13+166=538+228=42+108×6=130-(887-869)=440-292-53=466-66×4=900-264-427=706-(381+32)=827×2=42×6=46+(226-140)=447-361+84=443+(425-308)=48×9=433+50-229=110×5=910+417-843=331+21-338=202+233-32=503-306-142=882-714+335=354×4=915-882+617=236×5=163-100-55=335-(30+281)=678-137-70=109+(358-38)=341-183=46×(231-225)=748×(468-464)=86×8=618-157-235=597×2-694=23×4+373=140+57-140=87+390=103+340=804-17-98=437-274+89=227+(461-393)=952-552=250×4-993=150×2+247=355-94-221=912-(36+530)=454-182-203=44+194=378+265=450-424+365=198-198+345=164-14×6=673-88×7=248-21×9=488-48=676-373=89+318+258=350×(456-447)=880+105×9=690-(441-301)=721-(757-718)=308+98=617+877=97+(463-410)=185×5-888=220+(646-540)=606-117+670=266-(149-64)=380-211+241=105-(24+64)=407-342=247×2-415=290×(520-512)=35+776-103=175+(160-129)=418-66×2=82-(153-132)=59×(244-237)=646+300+363=893+412+308=831-(537-333)=553-64×6=428+491+892=123+361=1/9+3/9=69+(256-233)=596-383=269×3-330=482+(276-211)=363+105-220=259×(255-252)=158+101=351+109=902+78-181=621×2-57=104×7-716=847-76×2=139+(176-130)=305+73=63×3=706×(818-814)=568-(26+225)=134×4=234+83=25×(241-233)=633-90×5=463×5=161+(377-369)=100+21×8=660×5-817=430×7-474=164-32×3=168×4=89×9-683=1/4+2/4=249+210=855-235-157=844+172-401=738×6-78=313×3=313×4-458=956-(567-249)=435-255=74+269×2=988-(380-246)=307+132+752=324+(225-67)=446-22×5=375+140+79=359×3=662×6-787=242×2=441-(430-423)=286-(82-42)=57+339-188=274+180+58=394-23×6=340-39-107=645×8=91×4=51+54+435=498-110-147=898-223+609=987×7=116×6-17=802-259=824+(775-402)=189-17×7=530-(911-425)=341-252=392-44×2=426×4-202=137×4+658=791-339+65=398-273+692=433-(217+195)=1/5+2/5=113×(186-180)=924-234-597=609+(445-170)=112×(359-354)=283+133-323=556×8-437=279-10×2=955-638+820=873+(378-87)=153+240=438-37-228=872-276=759×(265-260)=38×4+191=2/6-1/6=235+178=126×6+187=367-182×2=116+664=519+591+234=310-(15+266)=186+39×7=115×7-74=202×2-116=156×(367-363)=498-431=945-394×2=257×(302-299)=252-36×7=386-182-83=260+239=667+562-691=341+123=4/9-3/9=320×3=50×(313-304)=683-144+62=258-115+333=885-(535+103)=828+777-141=393-(425-368)=395-309+147=144×4-227=801-422+686=123×(171-165)=200×2-258=424-131×3=890-31=753-252+876=581+120+938=812+(374-118)=161+22×5=242+191-307=391+(359-99)=364+(318-289)=328-(411-99)=107-(28+77)=414+547-241=31×8+948=359-(242+36)=192+389×2=112×(341-338)=92+569+336=465×8=469+(395-62)=401-158=405-47×2=212+(80-69)=163+134=127×6-358=432+557-168=511-(307+195)=482-260-131=530+991+274=343-(95+176)=244+(171-106)=718-(161+97)=482-(170-146)=121×(193-186)=334-319+89=49×(91-82)=392-359=499-462+114=195×2+66=245×3-616=154+824-646=697-28=703-(516+28)=493-60×2=808-57×3=458-(100+22)=217+338+115=740-64×7=164+140=359-222=917-80-429=851-153×4=3/7-2/7=244-125-75=100×4+486=887×9-432=5/9-3/9=17+56-47=315×2-610=10×3=2/4-1/4=999-231-765=308+146=41-19=404+90+753=503+33×9=59×8+365=687×8-175=686-185+889=433-124+37=42×6+329=340-103=554-(90+457)=467-10×2=956-675=286+374+708=参考答案228×4-625=287480×2=960770×9-138=6792600-(166+356)=78180-18-24=138301-(395-205)=111240-52-32=156244-173=71304+(463-337)=430104-53=51347+(446-172)=621402+(386-135)=653202+335+742=1279223+139=36222×9-107=9165×(259-256)=195817-106×4=393105-15×5=30582×3-786=96028+400-302=126997-(37+480)=480158-11×5=103102×9-897=21913+682=1595768+281=104912×6-44=28521-225+349=645386×2-312=460109-12×4=61124-(822-761)=63985-(474+509)=272×6+182=614480×(812-808)=192096+295=391375+251+115=741146×6=876400+(484-399)=485942-(154+337)=451384+13×7=475659-163+715=1211441-(136+204)=101835+452=1287190+146-247=89518×(559-555)=2072482-28×2=426108-41=67690×(225-217)=5520590+177=767108×(890-885)=54062+46×7=384465-(119+259)=87135×(432-429)=405294-(135+97)=622/7-1/7=1/7888-283=605413+32+69=514970-(516-83)=537500-43×8=15668+253=321705×8=5640441-(158+31)=25270+167=237331-(456-267)=142629-82×5=219470-315=155521-314-155=5214×4+466=522120×(294-290)=480537+744+882=2163693-249-422=22118+117×6=820282+(697-140)=839152+395=547955-(101+725)=129215+191=406569-(586-67)=502/8+3/8=5/8668+(166-55)=779418-(463-201)=15695×3-58=227596-71×4=312122×(56-50)=73288×2+696=872781+925=1706255×3=765305+138×5=995243+762+511=1516386+866-891=36114×5+313=383858-190×3=28866+398+279=743622-178=444126+350=476562+118=680738-28-686=24473-(128-89)=434441+626+807=1874301×3-106=797907+555+195=1657696-(591-221)=326133×4=532177+77+435=68918×(112-104)=144183×(995-991)=732949+443=1392350-47=303310×2=620567+110+82=759625+(923-426)=1122460×(402-393)=414065+368-150=283360-(189-34)=205197×7=137976×(271-263)=608873-190-501=182103×(174-166)=824136+39+169=344440-99=341552-(119+233)=200292-155+311=44854×(296-287)=486727-68-207=45214×(230-225)=70185-17×4=117136×(64-59)=680298×3-430=464522-267-70=185919+79×8=1551349-(396-101)=5488×2+706=882486-43×9=99319-308+72=8376-39=37672+(724-563)=833787-(164-98)=721832-330+408=910229×(918-911)=160340×3=12057+220-116=161155+329-105=379906×5-147=4383233×2=466899-289-235=375202+(430-403)=229203-179-23=1569-17×6=467390-225=165377-33×2=311898-(142+448)=308278×(573-566)=1946307+146-339=114345-213-90=42777+517-683=611187×5-539=396414×(474-465)=3726946-41×4=782514+293=807780-381+73=472169×5-34=811165-(63+36)=66969×4=3876227+128=355468-243-61=164224×3-432=24052×(368-365)=156471-(173-98)=396486+192×3=1062656-(32+238)=386577×8=4616708+302=1010640×(554-550)=2560471-(310+22)=139161+295-374=82853-62=791675+136+74=8851/5+3/5=4/5669+(419-187)=901382-94×2=194127-(69+33)=25403-(30+268)=105566-143+284=707545+773-586=732143-(472-331)=2205×4=820124×2+651=899116×(467-463)=464493×(306-300)=2958226-72=154381+655-286=750427-88×4=75609+91+85=785367-303=64164×2=328184+297×2=778246-106=140395-49×6=101120×5=600443-317=126163×2=326945-860+233=318477+692-431=738264+544+64=872648×(144-137)=4536646-105=541323-(235+64)=2496+149-49=196339-(290+28)=21100+236=33666+135=20177+150×4=677787×(815-810)=3935164-129+307=342791-648=143538-69-56=413971-765-96=110924+657-466=111576+(402-396)=82344×2=688960+(758-754)=964427-(253+81)=93625-409+824=104089×6+55=589315-83-60=172439-33×9=14278+(493-367)=204794-(238+444)=112923×(95-88)=646170×(141-137)=280337-(303-54)=8881×(494-490)=324668-(465+95)=108246+96-295=4792×(354-345)=828662-407=255386×(380-371)=347424×(259-254)=120484-101-140=243429-(251+157)=21440-314+172=298109+34+759=902316×6-847=1049242-(42+65)=135138+51=189324×8-410=218290+359-131=318177×2=354703-(323+223)=157544×7-316=3492243+341-285=299865-116×4=401756-157+53=652922+424-488=858465+142+160=76791×8=728408-164=244122×4-328=16026+196×3=614370-(341-156)=18515+284+550=849256+(497-263)=490378×2-739=17538×4=2152463-268=195493-67×6=9196+108+721=925779+82×9=1517181-16×3=133454+(178-105)=527732-40×8=412112+121=233889+567+783=2239111-32=79239+45=284445+43-131=357161×3+362=845810-160-635=15442-318-91=33799-262-76=461664+183=847444-116+65=393191-172+420=439214×(451-447)=85629×8+60=292711×(346-343)=2133343+139-25=457357-158-187=12359-12-146=201437+(464-453)=448250+(409-286)=373275+138+261=67420×(119-114)=100943-(516+179)=248982-(764-675)=893909-697=212301-43+77=335937-863=74236+276=512132×(320-317)=396123-(148-99)=74291+(788-349)=730534+770+683=1987225+75+21=321325-138=187126+(430-46)=510750+300+490=1540771-100×2=57183+(228-193)=118356-195-118=43674-561-81=32311+412×2=1135173×(446-441)=865356-219+870=1007733+579+506=1818780+(333-200)=913839+256×3=1607273-(263-235)=24549+159=208258×3=774894+(739-601)=1032441-305-45=91748+979+383=2110218-(370-274)=122668+769+679=2116306-14×2=278222-210=12399-202+203=400374-16-210=148748-70×2=608225-(425-369)=169185+613-597=201238-(179-70)=129618-418+205=405930-773=157477-222=255223×6-401=93727+422-106=343150-146+187=191910-228×2=454206-40+295=461598×5-30=2960849-(431+245)=173452-58×2=336841-(663-57)=235403-398+131=136315-205=110651+88×2=827237+622-333=526150×4=600217+539+842=159853×2+347=453364-(110+87)=167372-(234-160)=298159×(383-380)=4772/8+5/8=7/8170×9=1530140+696-225=61189×7=623363+391×2=1145813×7-415=5276310-15+68=363470-(466-114)=118326-49+987=1264559+193-688=64921-167×4=253965-(737+19)=209503-(577-129)=55943-(548-526)=921503+(651-332)=822928-26×2=876188-(84-77)=181180+(634-345)=469497-104=393557-111-204=242180×5=900480-83=39740×9=360385-173+231=443207+538+368=1113848+676-342=1182318-145-76=97877-(545-358)=690651+(942-537)=1056369+273=642652-105×3=337408×7-329=252791+(183-141)=133245×7-673=1042689-(334+55)=30014+219×3=671686×7-450=4352862-(224+182)=456198+106+368=672489-62-300=127480-(478-254)=256393+58-216=235292+343=635102×7+460=1174462+89-11=540311+166-189=288717-57-469=191980+371=1351443×2-61=825517+(179-137)=559120-115+130=135170×7=1190235-78+57=214443-321-10=112160-(380-236)=16326+156+453=935263+759-97=925514-(490-176)=20037+39-18=58345-10-122=213201-160+364=4055/9+3/9=8/938×6=228662-68×5=322257-149=1083/10-2/10=1/10502-408+838=93282+654+126=862807+(929-167)=1569830-(716-494)=608892×7=6244307+73-134=2463/6-1/6=2/6371-(450-118)=39611-49+741=1303517×5=2585112×6+253=925180-44=136116+333-408=41535-345+791=981361+(318-133)=546815-242=573206×9-109=174550×8+298=698210+217=427553×(884-878)=3318901-125×2=651232+58=290674+947-913=708429-(82-50)=397230×2=460821×6=4926699+724-479=944391-(177+35)=179460-(104+313)=43132+217-283=66348×3-898=14646×9+812=1226108-10-64=34669-63=606214+191=405288×2=576394-92-153=149132-(240-200)=92947-831-44=72245-(457-243)=31479-251+163=39150+120+440=610914-54-349=511491-(149+49)=293172+(139-108)=2032/7+5/7=1733+81×8=1381489×2-164=81471×(682-675)=497252+(304-59)=497147×3=441831×7=581746+821+41=908406-226-154=26421-(348-134)=207214×2-77=351349-99-25=225339-(286+47)=65/7+2/7=1429+926-295=1060282+(849-350)=781566×6=3396201+514=715500-(205+111)=184325+(486-402)=409534-55×8=94228+(413-146)=495870-57-768=45287+760-437=610949-156-663=130388-165=22380+282-45=317178+436=61468×7+427=90390+162-145=107245+68×3=449128×6+327=1095172+148+648=968640+90×4=1000498-(40+134)=32431+683+222=9361/7+5/7=6/7189-(59+88)=42566-(484-412)=494999×(830-821)=8991436-11-111=314467+156×2=779130×5-98=552479+50×3=629101-50×2=1193-56=137263-40=223951-(635-178)=494132+960+960=2052806-(38+39)=729219-191+376=404378×2-221=535704-(394+185)=125388+(331-106)=6133/6-2/6=1/6978-662=316337-257=8030+21+569=620553-110+673=1116155+33=188250+994+344=1588309×8=2472866+722+532=2120296+306=602681×6-229=3857366-59×2=248218+(339-138)=419659-(976-446)=129924+492=1416121×8=96898+37-115=2014×8=112467-(208+56)=203452+986+73=1511108+465+113=68647×(772-768)=188396-(234+150)=12618×8=4944884-577=307498-38×7=232638-520=118135-123+64=76127+531+194=852382-(365-253)=27068×5+591=931356-(357-29)=28454-(195+186)=73244+103×3=553363+16×4=427177+33-22=188276×2-376=1763/5+2/5=1778×8-466=575831+524+124=679113×4+609=1061254+859=1113664+241+572=14776/8-1/8=5/8138×5+158=8486/9-1/9=5/9237×4+868=18161/3+2/3=1292+180+53=525280-259+134=155826-(740-562)=648302-(762-562)=102962-721+14=255941-917+716=740222×3=666241+(994-401)=834205-147-23=35855-(538-97)=414923+(856-327)=1452399-257+19=1612/3-1/3=1/3386+(395-47)=734292+79=371438-(466-242)=214339-(122+71)=146480-(11+354)=115608×(45-40)=3040314+114=428136-13+166=289538+228=76642+108×6=690130-(887-869)=112440-292-53=95466-66×4=202900-264-427=209706-(381+32)=293827×2=165442×6=25246+(226-140)=132447-361+84=170443+(425-308)=56048×9=432433+50-229=254110×5=550910+417-843=484331+21-338=14202+233-32=403503-306-142=55882-714+335=503354×4=1416915-882+617=650236×5=1180163-100-55=8335-(30+281)=24678-137-70=471109+(358-38)=429341-183=15846×(231-225)=276748×(468-464)=299286×8=688618-157-235=226597×2-694=50023×4+373=465140+57-140=5787+390=477103+340=443804-17-98=689437-274+89=252227+(461-393)=295952-552=400250×4-993=7150×2+247=547355-94-221=40912-(36+530)=346454-182-203=6944+194=238378+265=643450-424+365=391198-198+345=345164-14×6=80673-88×7=57248-21×9=59488-48=440676-373=30389+318+258=665350×(456-447)=3150880+105×9=1825690-(441-301)=550721-(757-718)=682308+98=406617+877=149497+(463-410)=150185×5-888=37220+(646-540)=326606-117+670=1159266-(149-64)=181380-211+241=410105-(24+64)=17407-342=65247×2-415=79290×(520-512)=232035+776-103=708175+(160-129)=206418-66×2=28682-(153-132)=6159×(244-237)=413646+300+363=1309893+412+308=1613831-(537-333)=627553-64×6=169428+491+892=1811123+361=4841/9+3/9=4/969+(256-233)=92596-383=213269×3-330=477482+(276-211)=547363+105-220=248259×(255-252)=777158+101=259351+109=460902+78-181=799621×2-57=1185104×7-716=12847-76×2=695139+(176-130)=185305+73=37863×3=189706×(818-814)=2824568-(26+225)=317134×4=536234+83=31725×(241-233)=200633-90×5=183463×5=2315161+(377-369)=169100+21×8=268660×5-817=2483430×7-474=2536164-32×3=68168×4=67289×9-683=1181/4+2/4=3/4249+210=459855-235-157=463844+172-401=615738×6-78=4350313×3=939313×4-458=794956-(567-249)=638435-255=1807