四年级数学巧算练习题(二)

1、79X 20-59 X 20=98X 78- 48X 78=98X 12- 18X 12=54 X 68-24 X 68=67X 2- 27X 2=15X 6915=753X 59753=917X 49917=99X 30- 79X 30=89X 30- 29X 30=64X 8- 34X 8=50X 11- 20X 11=981X 9981=224X 49224=98X 86- 48X 86=605X 89605=68X 28- 38X 28=949X 59949=89X 3- 79X 3=54X 35- 34X 35=67X 62- 27X 62=45X 29- 15X 29=85X 43

2、- 65X 43=44X 13- 14X 13=665X 89665=53X 16- 23X 16=83X 94- 33X 94=97X 64- 77X 64=94X 57- 44X 57=744X 19744=71X 12- 1X 12=63X 6- 13X 6=92X 77- 82X 77=96 x 98-66 x 98=93x 86- 43x 86=54x 42- 44x 42=70X 9+70 =296x 79+296=65x 54- 55x 54=61x 24- 11x 24=90x 60- 30x 60=91x 85- 81x 85=484x 59+ 484=96x 63- 86x

3、 63=130x 39+130=95x 15- 65x 15=89x 64- 49x 64=84x 21- 14x 21=65x 32- 55x 32=62x 44- 2x 44=60x 23- 10x 23=95x 69- 5x 69=41x 64- 31x 64=59x 96- 49x 96=84x 25- 64x 25=68x 20- 28x 20=61x 57- 51x 57=848x 19+ 848=737x 39+737=42x 6- 12x 6=87x 78- 47x 78=95x 79- 45x 79=187x 59+187=72x 18- 12x 18=598x 29+598

4、=82x 16- 62x 16=91 x 94- 51 x 94=88x 26- 78x 26=85x 26- 15x 26=78X 14-48 x 14=85x 95- 25x 95=79x 29- 9x 29=36x 6- 16x 6=35x 12- 25x 12=42x 54- 2x 54=22x 29- 2x 29=90x 60- 0x 60=66x 82- 46x 82=66x 19- 36x 19=60x 83- 20x 83=98x 18- 28x 18=84x 98- 34x 98=72x 5- 52x 5=59x 17- 29x 17=12x 23- 2x 23=71x 10

5、- 21x 10=74x 56- 34x 56=33x 8- 3x 8=41x 82- 11x 82=87x 65- 47x 65=82x 6- 42x 6=85x 73- 55x 73=60x 10- 30x 10=40x73- 10x 73=56x 83- 16x 83=58x 29- 48x 29=71x 50- 41x 50=13x 66- 3x 66=71x 25- 51x 25=70X 27-60 X 27=75X 20- 15X 20=96X 82- 6X 82=32 X 5- 12X 5=93X 65- 53X 65=87X 92- 17X 92=74X 60- 34X 60=

6、96X 45- 76X 45=80X 76- 30X 76=979X 49979=68X 78- 28X 78=88X21-68X21=238X 29238=98X 76- 18X 76=73X 34- 33X 34=99X 24- 89X 24=49X 47- 9X 47=64X 5- 34X 5=98X 7- 78X 7=76X51-6X51=78X 15- 38X 15=75X 37- 45X 37=86X 6- 36X 6=84X 45- 64X 45=87X 89- 47X 89=87X 99- 77X 99=42X 5942=91X58-1X58=72X 44- 12X 44=67

7、X 85- 7X 85=77X 60- 67X 60=97X41-27X41=57X 76- 7X 76=30X 28-20X 28=71X50-11X50=81X36-51X36=165X 39+165 =97X 39- 37X 39=53X21-43X21=85X 62-35 X 62=79X 99- 9X 99=95X 50- 5X 50=60X 7-30X 7=30X 8- 10X 8=95X 32- 85X 32=99X 35- 19X 35=91X12-21X12=81X6-51X6=95X 73- 25X 73=21 X 26- 1 X 26=82X 80- 52X 80=50X

8、11-0X11=72X 34- 2X 34=73X 82- 3X 82=64X 14- 24X 14=681X89+681=894X 59+ 894=72X 58- 22X 58=89X 87- 39X 87=88X 23- 8X 23=96X 30- 56X 30=70X 43- 0X 43=84X 92- 44X 92=40X 47- 20X 47=57X 65- 27X 65=68X 90- 48X 90=31 x 72- 11 x 72=75x 73- 15x 73=95x 9- 5x 9=91 x 92-31 x 92=63x 98- 43x 98=833x 49833=96x 60

9、- 16x 60=56x 25- 46x 25=98x 26- 28x 26=87x 40- 27x 40=87x 60- 17x 60=12x 90- 2x 90=96x 21-26x 21=60x 90- 10x 90=425x 59425=95x 19- 65x 19=80x 61-70x 61=86x 79- 46x 79=76x 91-46x 91=63x 94- 3x 94=91x 8-31x 8=64x 79- 44x 79=36x 2- 6x 2=82x 6- 42x 6=89x 78- 19x 78=35x 4935=97x 43- 27x 43=90x 98- 0x 98=

10、848x 89848 =79x 49- 39x 49=52x 19- 22x 19=69x 29- 29x 29=96x 97- 46x 97=99X 78-89 x 78=32x 25- 12x 25=86x 20- 46x 20=55X 25-5X 25=82x 26- 72x 26=65x 31- 45x 31=22x 14- 12x 14=85x 10- 35x 10=77x 21- 7x 21=92x 71- 62x 71=98x 15- 78x 15=63x 65- 13x 65=75x 75- 15x 75=48x 55- 8x 55=96x 34- 46x 34=80x 33-

11、 10x 33=43x 97- 3x 97=95x 74- 35x 74=99x 7- 29x 7=79x 62- 69x 62=739x 29739=85x 34- 35x 34=97x 63- 57x 63=89x 68- 49x 68=88x 25- 18x 25=50x 14- 30x 14=73x 70- 53x 70=710x 79710=87x 63- 17x 63=92x 98- 22x 98=97x 91- 47x 91=82x 43- 52x 43=49x 87- 39x 87=94 X 29-64 X 29=99X 97- 79X 97=16X 35- 6X 35=40X

12、 34- 30 X 34=88X 5- 48X 5=94X 14- 44X 14=79X 23- 39X 23=41X 72- 11X 72=40X 8- 0X 8=52X 10- 22X 10=46X 59- 6X 59=36X 9- 26X 9=88X 68- 18X 68=12X 9- 2X 9=97X 15- 17X 15=93X 96- 3X 96=61X 42- 41X 42=55X 57- 35X 57=53X 67- 3X 67=73X 36- 33X 36=72X 88- 2X 88=87X 83- 47X 83=85X 64- 45X 64=13X 82- 3X 82=77

13、X 89- 7X 89=97X 5- 17X 5=66X 62- 6X 62=83X 98- 33X 98=44X 85- 34X 85=79X 72- 19X 72=77X 28- 57X 28=64X 99- 44X 99=57X 36- 7X 36=50X 45-40 X 45=90X 41- 20X 41=72X 42- 12X 42=72 X 32-22 X 32=83X 63- 63X 63=44X 53- 4X 53=80X 56- 40X 56=86X 60- 6X 60=83X 13- 63X 13=30X 1- 10X 1=74X 21- 64X 21=65X 16- 45

14、X 16=56X 19- 36X 19=564X 89564 =48X 99- 8X 99=96X 87- 16X 87=88X 90- 48X 90=56X 4- 16X 4=93X 50- 33X 50=70X 6- 20X 6=98X 93- 38X 93=63X 80- 53X 80=83X 5- 33X 5=51X 38- 1X 38=76X 86- 56X 86=40X 95- 30X 95=92X 92- 32X 92=45X 53- 25X 53=67X 82- 17X 82=86X 10- 16X 10=57X 66- 7X 66=77X 23- 57X 23=75X 18-

15、 15X 18=83X 95-33 x 95=75x 49- 35x 49=55x 78- 35x 78=99X 27-79 x 27=92x 72- 42x 72=48x 81- 8x 81=96x 4- 76x 4=59x 89- 9x 89=95x 98- 65x 98=21x 53- 11x 53=73x 38- 3x 38=52x 75- 32x 75=66x 27- 46x 27=84x 24- 74x 24=67x 64- 27x 64=65x 68- 25x 68=62x 76- 32x 76=90x 36- 50x 36=79x 24- 59x 24=95x 64- 75x

16、64=21x 14- 1x 14=36x 80- 16x 80=80x 93- 40x 93=64x 61- 14x 61=83x 92- 13x 92=98x 17- 18x 17=67x 55- 17x 55=75x 31- 55x 31=33x 1- 13x 1=98x 87- 28x 87=73x 40- 13x 40=57x 24- 17x 24=94x 80- 44x 80=92 X 47-42 X 47=58X 93- 8X 93=47X 8- 27X 8=68X 64- 38 X 64=91X 38- 51X 38=33X 10- 23X 10=79X 94- 49X 94=8

17、7X 50- 57X 50=21X 61- 1X 61=86X 68- 46X 68=63X 74- 43X 74=84X 12- 54X 12=71X 14- 31X 14=51X 63- 11X 63=61X 81- 11X 81=376X 59376=46X 86- 16X 86=84X 42- 74X 42=77X 41- 67X 41=23X 2- 3X 2=82X 59- 22X 59=92X 33- 72X 33=65X 70- 35X 70=94X 35- 44X 35=95X 31- 65X 31=939X 19939=74X 60- 14X 60=62X 74- 42X 7

18、4=96X 98- 56X 98=82X 98- 52X 98=31X 47- 1X 47=86X 40- 6X 40=79X 59- 29X 59=80X 47-50 X 47=87X 10- 17X 10=53X 62- 3X 62=91 x 99-71X 99=71X61-31X61=49X 47- 29X 47=81X86-41X86=66X 94- 36X 94=74X21-4X21=53X 62- 3X 62=99X 14- 29X 14=93X 19- 3X 19=96X 49- 36X 49=60X 12- 20X 12=58X 95- 8X 95=50X 23- 40X 23

19、=54X 19- 34X 19=91X74-51X74=97X 3- 77X 3=74X 69- 14X 69=67X 79- 47X 79=69X31-19X31=86X 68- 36X 68=99X 35- 69X 35=50X 26- 20X 26=96X 12- 46X 12=70X 73- 0X 73=99X 1 - 29X 1 =68X 25- 38X 25=41X39-31X39=51X92-1X92=40X 26- 30X 26=90X 55- 60X 55=90X 38-20X 38=462X 29462=57X 69- 37X 69=74 X 8-54 X 8=92X 41

20、- 12X 41=82X 982=28X 98-8X 98=721X 69721=91X 19- 1X 19=95X 21- 25X 21=80X 99- 20X 99=285X 19285=66X 99- 16X 99=253X 29253=213X 89213=24X 28- 4X 28=985X 9985=211X 49211 =92X 40- 52X 40=508X 19508=701X 49701=66X 67- 6X 67=81X 99- 11X 99=37X 1- 7X 1=42X 34- 2X 34=898X 89898=846X 89846=81X 7- 11X 7=884X

21、 49884=598X 59598=78X 31- 58X 31=93X 54- 13X 54=79X 21- 19X 21=51 x 98-21 x 98=52x 29+52=261x29+261=263X 19+263 =944x 9+944=30x 93- 0x 93=388x 79388=70x 79+70=26x 39+26=64x 97- 54x 97=60x 19+60=42x 5- 22x 5=344x 69+ 344=137x29+137=44x 19+44=80x 25- 50x 25=301x79+301=595x 39+595=311x89+311=85x 25- 25

22、x25=11 x 49+ 11 =90x31-10x31=95x91-55x91=67x 44- 27x 44=33x 37- 13x 37=610x39+610=94x 36- 64x 36=93x 38- 13x 38=81x35-21x35=682x 29+682=91x32-1x32=88x 54- 68x 54=503x 89+503=854 X 9+854 =94X 92- 4X 92=69X21-49X21=77X 4-57X 4=353X 89+353=81X57-41X57=120X 49+120 =72X 66- 62X 66=533X 39+ 533=75X 15- 55

23、X 15=568X 19+568=383X 69+ 383=932X 69+ 932=96X 65- 36X 65=95X 59- 35X 59=128X 69+ 128=63X 24- 3X 24=636X 49+ 636=69X 97- 59X 97=912X69+912=76X 28- 26X 28=573X 9+ 573=21X 62-11X 62=410X 69+410=261X79+261=374X 9+374=81X77-61X77=296X 29+ 296=74X 17- 44X 17=678X 49+678=86X 63- 26X 63=639X 79+639=93X 85-

24、 53X 85=94 X 42-4X 42=95X 77- 5X 77=66X 66- 56X 66=80X 4-20X 4=65X 27- 15X 27=43X 64- 13X 64=92X 55- 2X 55=35X 10- 15X 10=83X 96- 3X 96=434X 69434=39X 8939=650X 59650=652X 9652=81X 3- 31X 3=99X 74- 39X 74=807X 19807=380X 29380=73X 4- 33X 4=72X 24- 62X 24=89X 10- 69X 10=639X 79639=91X 31- 31X 31=78X

25、1- 18X 1=583X 49583=167X 89167=946X 59946=99X 56- 19X 56=86X 39- 6X 39=80X 14- 60X 14=70X 15- 10X 15=98X 2- 8X 2=275X 59275=702X 59702=791X 19+791 =980X 49+980=820X 79+ 820=97X 61-77 X 61 =66X 27- 16X 27=295X 29+ 295=167X 59+ 167=59X 47- 9X 47=91X8-1X8=61X84-11X84=91X 85-11X 85=275X 9+275=84X 14- 4X

26、 14=409X 19+409=78X 3- 68X 3=915X 29+ 915=273X 9+273=337X 19+337=994X 59+ 994=18X69+18=49X 63- 9X 63=95X 4- 5X 4=656X 79+656=560X 49+ 560=604X 49+ 604=60X 80- 10X 80=96X 56- 6X 56=48X 45- 38X 45=373X 39+373=98X 64- 58X 64=768X 9+ 768=59X 42- 19X 42=144X 59+ 144 =36 x 21- 16X 21 =71x16-21x16=92x 60-

27、12x 60=950X 9+950 =356x 29+356=73x 63- 13x 63=94x41-24x41=503x 69+503=97x 89+97=91x26-61x26=83x 43- 13x 43=99x 14- 59x 14=99x71-9x71=551x69+551=57x 40- 7x 40=548x 49+ 548=73x 47- 13x 47=64x 7- 24x 7=68x 65- 38x 65=740x 29+740=963x 79+963=239x 79+ 239=746x 69+746=441x19+441=693x 59+ 693=302x 49+302=7

28、6x 87- 56x 87=692x 79+ 692=486x 49+486=833x 39+833=76x 97- 36x 97=51x64-41x64=76x 98- 26x 98=99X 48-9X 48=66X61-56X61=94X 38- 34X 38=77X 2-37X 2 =87X 10- 47X 10=897X 19+897=95X 57-5X 57=94X 97- 74X 97=99X 40- 39X 40=138X 89+138 =54X31-4X31=39X 30- 29X 30=723X 59+723 =60X 39+60=63X 27- 23X 27=93X 57-

29、 13X 57=68X 25- 58X 25=95X 86- 5X 86=32 X 20-22 X 20=732X 29+732=31X60-1X60=971X 79+971 =88X 34- 68X 34=374X 29+ 374=92X 12- 2X 12=58X 29- 38X 29=81X12-31X12=64X 77- 54X 77=44X 2- 14X 2=41X66-11X66=699X 79+ 699=68X 33- 8X 33=66X 46- 56X 46=968X 69+968 =73x 88- 23x 88=97x 69- 17x 69=569X 79+569 =98x

30、97- 8x 97=87x 95- 7x 95=73X 89-33 x 89=397x 59+397=61x 69- 1x 69=85X 99-25X 99=70x 26- 20x 26=34x 56- 14x 56=44x 48- 34x 48=68x 27- 28x 27=87x 94- 27x 94=128x 29+ 128=198x 19+198=35x 39- 5x 39=98x 9- 48x 9=98x 6- 88x 6=78x 3- 8x 3=534x 39+ 534=79x 74- 29x 74=96x 81- 56x 81=90x 18- 70x 18=876x 89+876

31、=52x 50- 32x 50=529x 89+ 529=35x 29+35=651x 49+ 651=95x 18- 35x 18=72x 73- 52x 73=40x 5- 10x 5=86 x 71-36 x 71 =750x 29750 =66x 77- 16x 77=43X 92-3X 92=857x 49857=68x 99- 8x 99=55x 14- 5x 14=93x 33- 53x 33=88x 3- 18x 3=46x 92- 6x 92=193x 79193=96x 68- 16x 68=90x 28- 10x 28=641x39641=841x59841=560x 3

32、9560=92x 69- 2x 69=77x 34- 17x 34=81x33-1x33=55x 3- 5x 3=97x 64- 47x 64=84x 48- 24x 48=427x 49427=82x 98- 12x 98=51x45-11x45=853x 39853=966x 69966=56x 64- 6x 64=657x 69657=77x 2977=561 x 59561 =748x 49748=519x 19519=96 X 27-26 X 27=67X 72- 17X 72=99X 92- 19X 92=28X 27-8X27 =98X 52- 8X 52=88X 73- 8X 73=40X 53- 20X 53=34X 67- 24X 67=74X 98- 34X 98=82X 93- 2X 93=503X 79503 =64X 65- 14X 65=159X 89159=84X 37- 4X 37=80X 75- 0X 75=97X 41- 57X 41=94X 23-