三年級(jí)上冊(cè)每日口算試題

1、口算279= 53+8= 49= 82= 328= 81= 99= 84+7= 8044= 1800900= 49001800= 420+80=430+1000= 50060= 898= 648=34+9= 147= 5+58= 648=63= 99= 728= 78+15=8320= 4330= 91= 280+450=77= 3600+5800= 89+21= 4600+4700= = 豎式計(jì)算65+78 376+284 517-348 507-3485083 296 3058 577口算730190= 3700370= 85005500= 3200+5100=9642= 1200400=

2、 830300= 800+900=5836= 7000+3000= 57= 729=366= 819= 42+13= 426=7+44= 427= 648= 213=48= 549= 497= 427=357= 19+41= 2463= 485=273+6= 5673= 499+7= 432=比擬大小 豎式計(jì)算5437 4099 356+197 900-196929 649 556 10075口算637= 843= 65+37= 124+18=1648= 84+48= 255+36= 6842284= 899= 3663= 996=4276= 9680+7= 64408= 404+20=758

3、= 147+25= 155+8= 898=12+20= 168+30 77+8= 546+33=510+200= 15459= 11408= 7+18=130+80= 468= 857= 938= 1 1 比擬大小 1 豎式計(jì)算634-182 663+228 404-166 239+617804-423 469+334 845+55 358-136口算306= 364= 45+44= 488+7=1800+200= 9380= 65+37= 1081=78= 734= 384= 76+10=728= 648= 240= 717+30=628 359= 7059= 89+21=730190= 3

4、700370= 85005500= 3200+5100=9642= 1200400= 830300= 800+900=5836= 7000+3000= 57= 729=366= 819= 42+13= 426=7+44= 427= 648= 213=豎式計(jì)算423-349 500-452 726+598 501+389746+163 940-762 708-389 301-84口算36= 183= 186= 153= 63= 255= 205= 55= 306= 93= 43= 164=124= 82= 244= 44= 204= 246=25= 11= 21= 22= 82= 105=93=

5、 56= 11= 186= 61= 22= 122= 27= 155= 305= 246= 164=204= 153= 105= 51= 186= 306=45= 63= 44= 255= 366= 51= 122= 426= 243= 26= 66= 255=豎式計(jì)算749 172 608 53723 3 1233 2133 2143口算124= 33= 155= 339= 183= 872=36= 425= 205= 507= 105= 267=93= 186= 305= 204= 567= 25=22= 55= 186= 126= 126= 153= 204= 306= 244= 84=

6、 105= 426=243= 205= 42= 183= 126= 123=155= 164= 305= 246= 255= 205=183= 86= 3924= 328= 197= 126=126= 306= 153= 255= 205= 244=豎式計(jì)算249 6348 2476 83247567 3135 4993 6818口算204= 156= 366= 812= 155= 278=84= 102= 57= 2519= 93= 305=204= 164= 255= 36= 183= 306= 255= 34= 205= 244= 186= 62=186= 45= 186= 45= 54

7、= 17-9= 36= 124= 126= 183= 155= 318=3018= 7719= 246= 306= 78= 205=186= 153= 55= 518= 812= 367=246= 246= 164= 2519= 105= 356=豎式計(jì)算367 598 486 2796045 7083 3094 5023口算204= 278= 3924= 366= 183= 11= 22= 11= 41= 44= 64080= 155= 233= 1225= 48080= 165= 273= 9015= 484= 64016= 393= 2420= 323= 4816= 128= 273=

8、5614= 248= 142= 8345= 56080= 9624= 4020= 4030= 3726= 7639= 60559= 3023= 128= 2732= 4827= 45020= 7315 = 120600 = 200360= 6800400= 280270= 42500= 600040= 51280=豎式計(jì)算437+256 900-46 4075 829200-183 746+143 546 459口算31070= 40014= 470180= 100025= 160600= 20420= 290300= 8100300= 7600200= 7600400= 680270= 42

9、0030= 61300= 130050= 20048= 930660= 530280= 9200400= 84021= 180500= 8000500 = 190020= 200160= 8700300= 300330= 31400= 960080= 140300= 880040= 9600800= 750290= 5490= 15+25= 17+27 = 55+1= 14+24=比擬大小1525 1514 1727110210 11019 551豎式計(jì)算4305 3706 2607 38056402 4505 2305 2705口算76020= 7500500= 370200= 860042

10、00= 2404= 64080= 1510= 16030= 22040= 1045= 450050= 1202= 9030= 27030= 27030= 769= 667= 10054= 12315= 3604= 555= 326= 700070 20040 18030= 24040= 352= 1407= 136= 2803= 3502= 5011= 2506= 7200+900= 410-201= 1258= 豎式計(jì)算3805 4607 2084 3506563+344 928-687 889+142 800-128口算4820= 6600600= 390+140= 1180= 2450=

11、 3600400= 400050= 53070= 42090= 960030= 7700= 203+98= 1800300= 240+570= 4800400= 370+580= 580490= 910370= 258= 270190= 362= 6800= 54009= 42060= 9800= 3330= 3007= 9500= 豎式計(jì)算213+315 876-123 323 469729+183 600-162 4097 4157567 1097 4137 2153口算6300700= 5600700= 35007= 370560= 520490 45090 80330 70700 70

12、0070 400080 2400200 42090 170320 100051 520260 910190 35200 22200 8800400 9300300 6300 1800200 930030 28040 304199 125050 2140 760198 660220 500050 10091 753299 豎式計(jì)算4207 3707 1309 26076407 4507 2307 2707口算700070 20040 18030= 24040= 352= 1407= 136= 2803= 3502= 5011= 2506= 7200+900= 410-201= 1258= 482

13、0= 6600600= 390+140= 1180= 2450= 3600400= 400050= 53070= 42090= 960030= 7700= 203+98= 1800300= 240+570= 4800400= 370+580= 580490= 910370= 660220 500050 10091 753299豎式計(jì)算4203 5303 3803 16042097 3067 8017 5137口算258= 270190= 362= 6800= 54009= 42060= 9800= 3330= 3007= 9500= 6300700= 5600700= 35007= 37056

14、0= 520490 45090 80330 70700 700070 400080 2400200 42090 170320 520260 910190 35200 22200 8800400 9300300 6300 1800200 28040 304199 12050 2140 760198 豎式計(jì)算128+921 415-178 1237 4066647 829 4602 900-123口算80+140=4100=30006234=860-600=209=309=5008=406=233=2004=75+6=42+36=28+0=31-29=327=405=890=342=110+990

15、=367=254=780-620=270+15=124=88+7=9500=055=5006=57+8=183=2053=1303=602+30=1106=509=136=1009=08+6=128=95+3=135=265=3008=25+80=1107=35+35=8009=252=240+9=907=20005=6003=425=160-90=85+20=豎式計(jì)算4125 2177 5027 342三年級(jí)數(shù)學(xué)上冊(cè)第七單元自測(cè)卷一填空。20分1、7個(gè)是 。 2個(gè)是 。2、 個(gè)是。 個(gè)是3根據(jù)算式填算理。1= 個(gè)加 個(gè)是 個(gè)，就是 。2= 個(gè)減 個(gè)，剩 個(gè)，就是 。31= 個(gè) 減 個(gè)，剩 個(gè)

16、，就是 。二看圖寫(xiě)算式。16分1、 2、 = ( ) - = 3、 4、 ( )( )=( ) ( )( )=( )三寫(xiě)出陰影局部占全部的幾分之幾？6分1、 2、 3、 四選擇題，將正確答案的序號(hào)填在括號(hào)里。8分1、1是由 個(gè)組成的。 1 2 42、以下分?jǐn)?shù)最大的是 。 3、以下分?jǐn)?shù)最小的是 。 4、 的一半，再一半，結(jié)果是 。 五判斷題，對(duì)的打“，錯(cuò)的打“。5分1、= 2、 3、=1 4、一個(gè)西瓜分成2塊，其中一塊是整個(gè)西瓜的 5、有兩個(gè)杯子，各裝有半杯水，將它們倒在一起就剛好是一杯水。 六在里填上“、“或“=號(hào)9分1、 2、 3、 4、 5、 6、 7、1 8、 9、 七計(jì)算。9分1、 2

17、、 3、 4、 5、 6、1 7、1 8、 9、 八解答問(wèn)題。共22分，其中1、2題4分，3題9分、4題5分1、工程隊(duì)修鐵路，第一次修了要修局部的，第二次修了要修局部的，兩次共修了要修局部的幾分之幾？2、商店運(yùn)來(lái)一批水果。其中紅富士蘋(píng)果占水果總量的，香蕉占水果總量的，香蕉比蘋(píng)果多出總量的幾分之幾？3、小李、小張、小林三位民兵去打靶，小李打了子彈數(shù)量的，小張打了子彈數(shù)量的，剩下的是小林打的。1小李比小張多打了幾分之幾？ 2小李和小張一共打了幾分之幾？3小林打幾分之幾？4、三只大象用鼻子運(yùn)木材。第一只大象運(yùn)了全部的，第二只大象運(yùn)的和第三只大象運(yùn)的同樣多。第二只大象和第三只大象各運(yùn)了這批木材的幾分之

18、幾？九思考題。(5分)爸爸買(mǎi)了兩塊同樣的比薩餅，把其中的一塊平均分成6小塊，爸爸吃了1小塊，媽媽也吃了1小塊。把另一塊平均分成3小塊，小明吃了其中的1小塊。哪一塊剩下的多？口算20079000-600034-2697-43300474+4032+4852+197008160-9015+6534+56406130070046-2425+37605320+30090-4544-197006500+80054+2882-48400852+3597-4374-1656786-34600833-2534+847+3330004849豎式計(jì)算帶*號(hào)的題驗(yàn)算*329+675= 510-259= 1608=

19、468= 369978 1072849口算92-662-181200-50072872870-269000-500023+6949753+3625456+27032537+54356700+15078+367-156484800-1403500-2000507900564075+2596+3572833487+36450-3201300-50083-29213446+2549395-7豎式計(jì)算帶*號(hào)的題驗(yàn)算2743 5074 5987205 3005-268= 527+286=口算30059000-50064-2687-53500284+5062+4872+197004660-9025+553

20、4+56407430070086-2445+37605120+300100-5594-196006700+90074+2872-48200947+3597-5964-1656786-49300833-2554+2867+236004829豎式計(jì)算4397= 628= 706 4 389 728 569口算72-1652-281200-80064845990-26900-50073+6964753+3625456+27112547+54156750+15068+3287-35568+4800-140500-25030780054085+1566+2548834857-38750-3202400-

21、50093-29279446+8729385-7豎式計(jì)算帶*號(hào)的題驗(yàn)算633 534 36050994 5283 4109 口算95-4354-2660079000-500053+1932+48300474+4034+5615+657008160-9025+3746-24406130070044-1990-45605320+30082-4854+287006500+80074-1697-43400852+3533-25600856786-348493000434+847+33豎式計(jì)算帶*號(hào)的題驗(yàn)算2467 5049 289764= 829674= 849753= 568= 口算7281200-

22、50092-662-1823+699000-500072870-2656+2725449753+36700+150356032537+54800-140648478+367-1564090053500-200050733472875+2596+3583-291300-50087+36450-32095+75494217449+2豎式計(jì)算296= 2694= 499= 2807= 4073= 633 口算57-4384-2660079000-300062+1952+48500484+4024+5625+657005260-9055+3756-24408230070074-19100-456005

23、420+30072-4864+282006500+90084-1697-53400957+3593-25400863786-39849500434+2867+33豎式計(jì)算534 36050 994 5283 4109 117 8= 口算4081200-70092-1652-1853+699000-50072980-2646+2725450743+36750+250456132527+54600-140648268+367-3544030052500-200080734456885+2596+2573-291400-50087-38650-32045-73693213496+2豎式計(jì)算708 4

24、= 4827 8725 5066 3024 386= 口算97-5384-2640058000-50052+1962+48500284+5034+5625+557004660-9045+3786-24407430070094-19100-55605120+30072-4874+286006700+90064-1697-59200947+3533-25300856786-49829600454+2867+23豎式計(jì)算帶*號(hào)的題驗(yàn)算467= 608= 604482=378122= 521396= 700294=口算6481200-80072-1652-2873+69900-50045990-265

25、6+2725464753+36750+150156112547+54800-140568+978+3287-35408005500-25030734848885+1566+2563-292400-80057-38750-30055-77296189436+8豎式計(jì)算3554 50783069388 557 739口算82-4854+287006500+80074-1697-43400852+3533-25600856786-348493000434+847+337281200-50092-662-1823+699000-500072870-2656+2725449753+36700+15035

26、6032537+5495-4354-2660079000-5000豎式計(jì)算帶*號(hào)的題驗(yàn)算864328 600384 382859635478 80037 489378口算53+1932+48300474+4034+5615+657008160-9025+3746-24406130070044-1990-45605320+300800-140648478+367-1564090053500-200050733472875+2596+3583-291300-50087+36450-32095+75494217449+2豎式計(jì)算488= 547= 546=749= 4075= 7396=口算74-1

27、697-43400852+3533-25600856786-348493000434+847+337281200-50092-662-1823+699000-500072870-2656+2725449753+36700+150356032537+54800-140648478+367-1564090053500-2000507豎式計(jì)算6045= 3126 633 534 36050 994 口算33472875+2596+3595-4354-2660079000-500053+1932+48300474+4034+5615+657008160-9025+3746-24406130070044

28、-1990-45605320+30082-4854+287006500+80053-291200-50097+36650-35093+73694427449+5豎式計(jì)算帶*號(hào)的題驗(yàn)算5283 4109 456+2796045= 3126 633 口算45+3786-24407430070094-19100-55605120+30072-4874+286006700+90064-1697-59200947+3533-25300856786-49829600454+2867+236481200-80072-1652-2873+69900-50045990-2656+2725464753+36豎式計(jì)

29、算65+78 376+284 517-348 507-3485083 296 3058 577口算750+150156112547+54800-140568+978+3287-3597-5384-2640058000-50052+1962+48500284+5034+5625+557004660-9045008005500-25030734848885+1566+2563-292400-80057-38750-30065-3819699426+8豎式計(jì)算5437 4099 356+197 900-196929 649 556 10075口算97-5354+284008420070052+199

30、7-43567320+30034+56600834+8700+90045+373000492-647+3594-191200-50072886-4972-489000-500049767+2364-16254032552-2833-2535678+390-2682954-263500-200053+36豎式計(jì)算634-182 663+228 404-166 239+617804-423 469+334 845+55 358-136口算64832+4875+2547+5473+6915+65600787-3556+2746-2430048000-500750+15090-45700884+508

31、00-1406484406660-90409005605307348728700666+2563-291300-50097+36450-30055-75494427496+8豎式計(jì)算249 6348 2476 3135 4993 6818口算84-26700652+3545+3762+48400886-3494-1925+5556747+3372-4886-2434+862-1864-16100-5592-670-2633-2574+2872853+3682997-5949737+546483008032567-1573+696004600750756+27豎式計(jì)算213+315 876-12

32、3 323 469 729+183 600-162 口算1200-800300496+35750+150900-50070089000-50008004097-53156605160-9052+19568+978+3130070034+5680053500-2000320+300450048875+25500+8003482400-80087+36650-35063-297296217449+565-3豎式計(jì)算4097 4157 567 1097 4137 2153口算4005500+80074-1686-24500252+3533-25100-55700486-34

33、84974+2840747+3372897-5960562-1823+693008600670-2656+276004200953+36700+1501200-80056737+54800-140900-50054+289000-5000640254豎式計(jì)算367 598 486 2796045 7083 3094 5023口算72-1674+40334156459160-9095-43568+9647130070053+1984-261125320+30034+5662+4878+3267-1525+3725+55500-25050744-19800585+1596+3582-4848857

34、-38450-32053-292400-800189449+293+78196豎式計(jì)算4203 5303 3803 3067 8017 5137口算8000-50082-4897-4340784+5074-166008605660-9033-2530004600643007008491200-5002009120+3007289000-5000567700+90023+6925454+2847+3556+2735672-1686-49700+150648445967+2395-439005647豎式計(jì)算1604 4207 3707 1309 2607 6407 口算 52-2853+19728

35、112590-2634+5654-2678+3253+3625+3732+48400547+5444-1915+65500287-35800-14046-24700430764090-45500-25066+2533454+2885+15750-30083-291200-50057-3836+895+73694994豎式計(jì)算367 598 486 279 6045 7083 口算43007008491200-5002009120+3007289000-5000567700+90023+6925454+2847+3556+2735672-1686-49700+150648445967+2395-

36、43900564752-2853+19728112590-2634+5654-2678+3253+3625+3732+484005豎式計(jì)算帶*號(hào)的題驗(yàn)算*329+675= 510-259= 1608= 468= 369978 1072849口算47+5444-1915+65500287-35800-14046-24700430764090-45500-25066+2533454+2885+15750-30083-291200-50057-388000-50082-4897-4340784+5074-166008605660-9033-2530004600635+894+736445494豎式計(jì)

37、算帶*號(hào)的題驗(yàn)算2743 5074 5987205 3005-268= 527+286=口算200953+36700+1501200-80056737+54800-140900-50054+289000-500064025472-1674+40334156459160-9095-43568+9647130070053+1984-260125320+30034+5662+4878+3267-1525+3725+55500-25050744-198005豎式計(jì)算帶*號(hào)的題驗(yàn)算2467 5049 289764= 829674= 849753= 568= 口算85+1596+3582-48488400

38、5500+80074-1686-24500252+3533-25100-55700486-3484974+2840747+3372897-5960562-1823+693008600670-2656+27600457-38450-32053-292400-900182749+2093+67295豎式計(jì)算帶*號(hào)的題驗(yàn)算2743 5074 5987205 3005-268= 527+286=口算97-5949737+546483008032567-1573+696004600750756+271200-800300496+35750+150900-50070089000-5000800-14025

39、440674+4097-53156605160-9052+19568+978+3130070034+5684-26700652+3545+3762+48400186-3494-1925+5556747+3372-4886-2434+862-1864-16100-5592-670-2633-2574+2872853+3682948875+25500+8003482400-80087+36650-35063-297296217449+565-340747+3372897-59200+180= 56+125= 400-70= 71+28=355= 90+150= 68= 36-18=910-90=

40、387= 220+150= 69= 789= 45-27= 720-180= 99=290-40= 770-160= 67= 408=600+270= 620+150= 37= 77=376= 569= 760+100= 750+125=200+50= 430+27= 46= 198=720-70= 820-128= 33-17= 71-43=819= 728= 71-24= 250-60=668= 55= 287= 336=15+43= 58-36= 66= 60+350=840+90= 59= 437= 460-72=136= 94= 34+23= 34+56=30+540= 620-57

41、= 115= 67-53=220+170= 47= 196= 216=69+32= 680-120= 770+630= 33=52+81= 99= 839= 330-172=86= 62+52= 38+52= 56=415= 75+75= 70+18= 54=366= 70-18= 900-80= 70+450=367= 446= 58+14= 78-23=94-46= 78= 87= 527=64= 500+700= 30+38= 84-12=2300-500= 44+23= 44= 22=72= 520-30= 980-400= 63=750+60= 81= 82= 175=2007900

42、0-600034-2697-43300474+4032+4852+197008160-9015+6534+56406130070046-2425+37605320+30090-4544-197006500+80054+2882-48400852+3597-4374-1656786-34600833-2534+847+333000484992-662-181200-50072872870-269000-500023+6949753+3625456+27032537+54356700+15025867-156484800-1403500-2000507900564075+2596+35728334

43、87+36450-3201300-50083-2930079000-500054-2687-43500484+4052+4862+197005260-9025+6524+56408230070056-2455+376005420+300100-4574-192006500+90064+2872-48400957+3597-5384-16 63786-39400893-2534+2867+33500484992-1652-181200-70040872980-269000-50053+6950743+3625446+27132527+54456750+2502500-20008073005440

44、85+2596+2556834487-38650-3201400-50073-2930059000-50064-2687-53500284+5062+4872+197004660-9025+5534+56407430070086-2445+37605120+300100-5594-196006700+90074+2872-48200947+3597-5964-1656786-49300833-2554+2867+23600482972-1652-281200-80064845990-26900-50073+6964753+3625456+27112547+54156750+15068+3287

45、-35568+4800-140500-250307800540 85+1566+2548834857-38750-3202400-50093-2953+1932+48300474+4034+5615+657008160-9025+3746-24406130070044-1990-45605320+30082-4854+287006500+80074-1697-43400852+3533-25600856786-348493000434+847+337281200-50092-662-1823+699000-500072870-2656+2725449753+36700+150356032537

46、+5464090053500-200050733472875+2596+3583-291300-50087+36450-32057-4384-2660079000-300062+1952+48500484+4024+5625+657005260-9055+3756-24408230070074-19100-456005420+30072-4864+282006500+90084-1697-53400957+3593-25400863786-39849500434+2867+334081200-70092-1652-1853+699000-50072980-2646+2725450743+367

47、50+250456132527+5444030052500-200080734456885+2596+2573-291400-50087-38650-32097-5384-2640058000-50052+1962+48500284+5034+5625+557004660-9045+3786-24407430070094-19100-55605120+30072-4874+286006700+90064-1697-59200947+3533-25300856786-49829600454+2867+236481200-80072-1652-2873+69900-50045990-2656+27

48、25464753+36750+150156112547+54800-140568+978+3287-35408005500-25030734848885+1566+2563-292400-80057-38750-300口算279= 53+8= 49= 82= 328= 81= 99= 84+7= 8044= 1800900= 49001800= 420+80=430+1000= 50060= 898= 648=34+9= 147= 5+58= 648=63= 99= 728= 78+15=8320= 4330= 91= 280+450=77= 3600+5800= 89+21= 4600+47

49、00= = 豎式計(jì)算65+78 376+284 517-348 507-3485083 296 3058 577口算730190= 3700370= 85005500= 3200+5100=9642= 1200400= 830300= 800+900=5836= 7000+3000= 57= 729=366= 819= 42+13= 426=7+44= 427= 648= 213=48= 549= 497= 427=357= 19+41= 2463= 485=273+6= 5673= 499+7= 432=比擬大小 豎式計(jì)算5437 4099 356+197 900-196929 649 55

50、6 10075口算637= 843= 65+37= 124+18=1648= 84+48= 255+36= 6842284= 899= 3663= 996=4276= 9680+7= 64408= 404+20=758= 147+25= 155+8= 898=12+20= 168+30 77+8= 546+33=510+200= 15459= 11408= 7+18=130+80= 468= 857= 938= 1 1 比擬大小 1 豎式計(jì)算634-182 663+228 404-166 239+617804-423 469+334 845+55 358-136口算306= 364= 45+4

51、4= 488+7=1800+200= 9380= 65+37= 1081=78= 734= 384= 76+10=728= 648= 240= 717+30=628 359= 7059= 89+21=730190= 3700370= 85005500= 3200+5100=9642= 1200400= 830300= 800+900=5836= 7000+3000= 57= 729=366= 819= 42+13= 426=7+44= 427= 648= 213=豎式計(jì)算423-349 500-452 726+598 501+389746+163 940-762 708-389 301-84口

52、算36= 183= 186= 153= 63= 255= 205= 55= 306= 93= 43= 164=124= 82= 244= 44= 204= 246=25= 11= 21= 22= 82= 105=93= 56= 11= 186= 61= 22= 122= 27= 155= 305= 246= 164=204= 153= 105= 51= 186= 306=45= 63= 44= 255= 366= 51= 122= 426= 243= 26= 66= 255=豎式計(jì)算749 172 608 53723 3 1233 2133 2143口算124= 33= 155= 339= 1

53、83= 872=36= 425= 205= 507= 105= 267=93= 186= 305= 204= 567= 25=22= 55= 186= 126= 126= 153= 204= 306= 244= 84= 105= 426=243= 205= 42= 183= 126= 123=155= 164= 305= 246= 255= 205=183= 86= 3924= 328= 197= 126=126= 306= 153= 255= 205= 244=豎式計(jì)算249 6348 2476 83247567 3135 4993 6818口算204= 156= 366= 812= 155

54、= 278=84= 102= 57= 2519= 93= 305=204= 164= 255= 36= 183= 306= 255= 34= 205= 244= 186= 62=186= 45= 186= 45= 54= 17-9= 36= 124= 126= 183= 155= 318=3018= 7719= 246= 306= 78= 205=186= 153= 55= 518= 812= 367=246= 246= 164= 2519= 105= 356=豎式計(jì)算367 598 486 2796045 7083 3094 5023口算204= 278= 3924= 366= 183= 11= 22= 11= 41= 44= 64080= 155= 233= 1225= 48080= 165= 273= 9015= 484= 64016= 393= 2420= 323= 4816= 128= 273= 5614= 248= 142= 8345= 56080= 9624= 4020= 4030= 3726= 7639= 60559= 3023= 128= 2732= 4827= 45020= 7315 = 120600 = 200360= 6800400= 280270= 42500= 600040= 51280=豎式計(jì)算437+25