1、小学四年级数学简便运算归类四年级下册数学简便运算归类强化训练第一类:加65+73+135 357+288+143 272+68+28129+235+171+165 17+145+23+35 999+99+9+3第二类:减400-256-44 517-53-47 284-159-41258-42-16 545-167-145 478-47-178344-(144+37) 236-(177+36)第三类:乘8(12513) (250125)(48)88125 72125 12564254212585 25488125第四类:乘(12+50)40 125(40-8) 7610318125 2544
2、4225 999 9978第五类:乘4537+3755 2821+2879 1723-2373846+6438 9932+32 46+46591672+1673+1675 398+639-3943366+3334第六类:除36049 25052 60012580058 480548 24051242035 240025 7800125第七类:加减92+99 197+102 354-108323+189-123 248-86+48 672-36+64(6467-832)+(1832-1467) 1530+(592-530)-192(2+4+6+98+100)-(1+3+5+97+99)第八类:乘
3、除9604648 9900012111 3702381234640(164) 1000(1254)第九类:加减乘除(98+147)49 (230-23)23 (250-25)25173628+106428 125(860+24012) 第一类:加65+73+135 357+288+143 272+68+28=65+135+73 =357+143+288 =272+28+68 =200+73 =500+288 =300+68=273 =788 =368129+235+171+165 17+145+23+35 999+99+9+3=129+171+235+165 =17+23+145+35 =99
4、9+1+99+1+9+1=300+400 =40+180 =1000+100+10 =700 =220 =1110第二类:减400-256-44 517-53-47 284-159-41=400-(256+44) =517-(53+47) =284-(159+41)=400-300 =517-100 =284-200=100 =417 =84258-42-16 545-167-145 478-47-178=258-(42+16) =545-145-167 =478-178-47=258-58 =400-167 =300-47=200 =233 =253344-(144+37) 236-(177
5、+36)=344-144-37 =236-177-36=200-37 =236-36-177=163 =200-177 =23 第三类:乘8(12513) (250125)(48)=812513 =25012548=100013 =25041258=13000 =10001000 =100000088125 72125 1256425=118125 =98125 =12582425=111000 =91000 =10002100=11000 =9000 =2000004212585 25488125=4251258 =254118125=2101000 =100111000=210000 =1
6、100000第四类:乘(12+50)40 125(40-8) 76103=1240+5040 =12532 =76(100+3)=480+2000 =12584 =76100+763=2480 =10004 =7600+228 =4000 =782818125 2544 4225=92125 = 25411 =21225=9250 =10011 =2150=2250 =1100 =1050 999 9978=(100-1)9 =10078-78=900-9 =7800-78=891 =7722第五类:乘4537+3755 2821+2879 1723-237=37(45+55) =28(21+
7、79) =23 (17-7)=37 100 =28 100 =2310=3700 =2800 =2303846+6438 9932+32 46+4659=38(46+64) =32(99+1) =46(1+59)=38110 =32100 =4660=38100+3810 =3200 =2760 =3800+380 =41801672+1673+1675 398+639-394=167(2+3+5) =39(8+6-4)=16710 =39 10=1670 =3902324+2542+2718+2581 9922+3334=238+258+278+258 =33322+3334=(23+25+
8、27+25)8 =3366+3334=1008 =33(66+34)=800 =33100 =3300第六类:除36049 25052 600125=36036 =25010 =60060=10 =25 =1080058 480548 240512=80040 =480485 =240125=20 =105 =205 =2 =4 42035 240025 7800125=42075 =(24004)(254) =(78008)(1258)=605 =9600100 =624001000=12 =96 =62.4第七类:加减92+99 197+102 354-108=91+1+99 =197+2
9、+100 =354-100-8=91+100 =199+100 =254-8=191 =299 =246 323+189-123 248-86+48 672-36+64=323-123+189 =248-(86-48) =636+64=200+189 =248-38 =700=389 =210 (6467-832)+(1832-1467) 1530+(592-530)-192=6467-832+1832-1467 =1530+592-530-192=6467-1467+1832-832 =1530-530+592-192=5000+1000 =1000+400=6000 =1400(2+4+6
10、+98+100)-(1+3+5+97+99)=(2-1)+(4-3)+(6-5)+。+(98-97)+(100-99)=50第八类:乘除9604648 9900012111 3702381234=9604846 =99000(12111) =3702123438=2046 =9900011 =338=920 =9000 =114640(164) 1000(1254)=6404 =10001254=160 =84 =32第九类:加减乘除(98+147)49 (230-23)23 (250-25)25=9849 +14749 =23023 -2323 =25025-2525=2+3 =10-1 =10-1=5 =9 =9173628+106428 125(860+24012)=(1736+1064)28 =125(860+20)=280028 =125880=100 =1258110 =1000110 =110000
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