小学四年级下册数学经典简便运算归类及其答案

1、小学四年级数学简便运算归类强化训练题第一类：加65+73+135357+288+143272+68+28129+235+171+16517+145+23+35999+99+9+3第二类：减400-256-44517-53-47284-159-41258-42-16545-167-145478-47-178344- (144+37)236- (177+36)第三类：乘8X (125X13)(250X125) X (4X8)88X12572X125125X64X2542X125X8X525X4X88X125第四类：乘(12+50) X40125 X (40-8)76X10318X12525X444

2、2X2599X999X78第五类：乘45X37+37X5528X21+28X7917X23-23X738X46+64X3899X32+3246+46X59167X2+167X3+167X539X8+6X39-39X499X22+33X3423X2X4+25X4X2+27X1X8+25X8X1第六类：除360 + 4 + 9250 + 5 + 2600 + 12+58004-54-8480 + 5 + 482404-54-1278004-125420 3524004-25第七类：加减92+99197+102354-108323+189-123248-86+48672-36+64(6467-832

3、) +(1832-1467)1530+ (592-530) -192(2+4+6+98+100) - (1+3+5+97+99)第八类：乘除960X464-48990004-121X113702X38 1234640+ (164-4)10004- (1254-4)第九类：加减乘除(98+147) +49(230-23) +23(250-25) +251736 + 28+1064 28125X (860+2404-12)答案：第一类：加65+73+135357+288+143272+68+28=65+135+73=357+143+288=272+28+68=200+73=500+288=300+

4、68=273=788=368129+235+171+16517+145+23+35999+99+9+3=129+171+235+165=17+23+145+35=999+1+99+1+9+1=300+400=40+180=1000+100+10=700=220=1110第二类：减400-256-44517-53-47284-159-41=400- (256+44)=517-(53+47)=284-(159+41)=400-300=517-100=284-200=100=417二84258-42-16545-167-145478-47-178=258-(42+16)=545-145-167=47

5、8-178-47=258-58=400-167=300-47=200二233二253344- (144+37)236- (177+36)=344-144-37=200-37=163第三类：乘8X (125X13)=8X125X13=1000X13=1300088X125=11X8X125=11X1000=1100042X125X8X5=42X5X125X8=210X1000=236-177-36=236-36-177=200-177=23(250X125) X (4X8)=250X125X4X8=250X4X125X8=1000X1000=100000072X125=9X8X125=9 X10

6、00=9000125X64X25=125X8X2X4X25=1000X2X100=20000025X4X88X125=25X4X11X8X125=100X11X1000=210000=1100000第四类：乘(12+50) X40125X (40-8)76X103=12X40+50X40=125X32=76X (100+3)=480+2000=125X8X4=76X100+76X3=2480=1000X4=7600+228=4000=782818X12525X4442 X 25=9X2X125=25X4X11=21X2X25=9X250= 100X11=21X50=2250=1100=1050

7、99X999X78= (100-1) X9=100X78-78=900-9=7800-78=891=7722第五类：乘45X37+37X5528X21+28X7917X23-23X7=37X (45+55)=28X (21+79)=23 X (17-7)=37 X100=28 X100=23X10=3700=2800=230=38X (46+64)=32X (99+1)=46 X (1+59)=38X110=32X100二46 X 60=38X100+38X10=3200=276038X46+64X3899X32+3246+46X59=3800+380=4180167X2+167X3+167X

8、5二167X(2+3+5)=167X10=167039X8+6X39-39X4=39X(8+6-4)=39 X10=39023X2X4+25X4X2+27X1X8+25X8X1=23 X 8+25 X 8+27 X 8+25 X 8= (23+25+27+25) X8=100X899X22+33X34=33X3X22+33X34=33X66+33X34=33X (66+34)=800=33X100=33003604-44-92504-54-26004-124-5=3604-36=2504-10=6004-60=10=25=108004-54-84804-54-482404-54-12=8004

9、-40=4804-484-5=2404-124-5=20=104-5=20 + 5=2二44204-3524004-2578004-125=4204-74-5= (2400X4)4-(25X4)= (7800X8)4-(125X8)=604-5=96004-100=624004-1000=12二96=62.4第七类：加减92+99197+102354-108=91+1+99=197+21100=354-100-8=91+100=199+100=254-8第六类：除=191=299二246=323-123+189=248- (86-48)=636+64=200+189=248-38=700二38

10、9=210323+189-123248-86+48672-36+641530+ (592-530) -192=1530+592-530-192=1530-530+592-192=1000+400=1400(6467-832) + (1832-1467)=6467-832+1832-1467=6467-1467+1832-832=5000+1000=6000(2+4+6+98+100) - (1+3+5+97+99)=(2-l)+(4-3)+(6-5)+oooo + (98-97) + (100-99)=50第八类：乘除960X464-48=9604-48X46=20X46990004-121X11=990004-(1214-11)=990004-113702X38 1234=37024-1234X38=3X38二920=9000=114640+ (164-4)10004- (1254-4)=640 + 4二160=1000125X4=8X4二32第九类：加减乘除(98+147) +49=98+49 +1474-49=2+3二5(230-23) +23=23