1、四年級(jí)數(shù)學(xué)巧算練習(xí)題（二）54 X68 24X68 =753 X59+753 =89 X30-29X30 =981 X9 + 981 =605 X89+605 =89X3-79 > =45X29-15X29 =665 X89+665 =97 X64-77X64 =71 X121 X12 =98 X78 48X78 =917X49+917 =64X8-34X8 =224 X49+224 =68X28 38X28 =54 X35-34X35 =85 X43-65X43 =53 X16-23 X16 =94 X57-44X57 =63X6-13X6 =98 X1218X12 =15X69+15

2、 =99 X30-79X30 =50 X11-20 X11 =98 X86-48X86 =3 / 36949 X59+949 =67 X62-27X62 =44 X1314X13 =83 X94-33X94 =744 x19+744 =92 X77 82X77 =96 X98-66X98 =70X9 + 70 =61 X24-11 X24 =484 X59+484 =95 X15-65 X15 =65 X32-55X32 =95 X69-5X69 =848 刈9+848 =87 X78 47X78 =72 X1812X18 =93 X86-43X86 =296 X79+296 =90 X60-

3、30X60 =96 X63-86X63 =89 X64-49X64 =62 X44-2X44 =41 X64-31 X64 =68X20-28X20 =737 X39+737 =95 X79 45X79 =598X29+598 =5 / 3622X29-2X29 =65 X54 - 55 X54 = 91 X85-81 X85 =130 X39+ 130 =84X21-14X21 =60X23-10X23 =59 X96 - 49 X96 =61 X57-51 X57 = 42X6-12X6 =187 X59+ 187 =82 X16-62 X16 =91 X94-51 X94 =78 X14

4、-48 X14 =66 X19-36 X19 =84 X98-34X98 = 12X23-2X23 =33X8-3X8 =82X6-42X6 =40 X7310X73 =71 X50-41 X50 =88 X26-78X26 =85 X95 25X95 =35 X12-25 X12 =90 X60-0X60 =60 X83-20X83 =72X5-52X5 =7 / 3658X29 48X29 =41 X82-11 X82 =85 X73-55X73 =56 X8316X83 =13X66-3X66 =85 X26-15X26 =79X29-9X29 =42 X54-2X54 =66 X82

5、46X82 =98 X18-28 X18 =59 X17-29 X17 =74 X56-34X56 =87 X65-47X65 =71 X25-51 X25 =70X27-60X27 =32X512溝=74 X60 34X60 =979 X49+979 =238X29+238 =99 X24 89X24 =98X7 78X7 =75 X37 45X37 =87X89-47X89 =91 X58-1 3 =77X60-67X60 =75X20-15X20 =9/3673 >04 33X34 =96 X45-76X45 =68 X78 28X78 =98 X7618X76 =49 X47-9

6、X47 =76X51-6X51 =86X6-36X6 =87 X99-77X99 =72 X4412X44 =97X41-27X41 =96 X82-6X82 =87 X92-17X92 =80 X76 30X76 =64X5-34X5 =78 X15-38 X15 =84 X45-64X45 =42 X59 + 42 =67 X85-7X85 =57 X76 7X76 =30X28-20X28 =165 X39+ 165 =85 X62 35X62 =60X7 30X7 =99 X35-19X35 =95 X73 25X73 =50X110X11 =11 / 3657 X65-27X65 =

7、72 X58-22X58 =96 X30-56X30 =40 X47-20X47 =71 X50-11 X50 =97 X39-37X39 =79 X99-9X99 =30X8-10X8 =91 X12-21 X12 =21 X26-1 X26 =72 X34-2X34 =681 X89+681 =89X87-39X87 =81 X36-51 X36 =53X21-43X21 =95 X50-5X50 =95 X32-85X32 =81 X6-51 X6 =82 X80-52X80 =73 X82-3X82 =894 X59+894 =88X23-8X23 =84 X92-44X92 =68

8、X90-48X90 =31 X7211 X72 =91 X92-31 X92 =13 / 3680X61-70X61 =87 X40-27X40 =96X21-26X21 =95 X19-65 X19 =76X91-46X91 =64 X79 44X79 =89 X7819X78 =90 X98-0X98 =52 X19-22 X19 =75 X7315X73 =63 X98-43X98 =56X25-46X25 =87 X60-17X60 =63 X94-3X94 =36X2-6>2 =35 X49 + 35 =848 X89+848 =69X29-29X29 =95X9-5X9 =8

9、33 X49+833 =98 X26 28X26 =12X90-2X90 =425X59+425 =86 X79 46X79 =91 X8-31 X8 =82X6-42X6 =15/3632X25-12X25 =79 X49 39X49 =96 X97-46X97 =99 X78 - 89 X78 =55X25-5X25 =22 X14-12X14 =92X71-62X71 =75 X75-15X75 =80 X33-10X33 =99X7 29X7 =85 X34 - 35 X34 =88X25-18X25 =710X79+710 =82 X26-72X26 =85 X10-35 X10 =

10、98 X15-78 X15 =48 X55-8X55 =43 X97-3X97 =79 X62-69X62 =97 X63-57X63 =50 X14-30 X14 =87 X63-17X63 =82 X43-52X43 =86X20-46X20 =65X31-45X31 =77X21-7X21 =17 / 3653 X67-3X67 =96 X34-46X34 =95 X74 35X74 =739X29+739 =89 X68-49X68 =73 X70 53X70 =92 X98-22X98 =49 X87-39X87 =94X29-64X29 =40 X34-30X34 =79X23-3

11、9X23 =52 X10 22 X10 =88 X68-18X68 =87 X83 47X83 =77 X89-7X89 =83 X98 - 33 X98 =77X28-57X28 =99 X97 - 79 X97 =88X5-48X5 =41 X72-11 X72 =46 X59 6 3 =12X9-2X9 =61 X42-41 X42 =73 X36-33X36 =85 X64 45X64 =97X517溝=19/3672 X32-22X32 =64 X99-44X99 =16X35-6>5 =94 X14-44 X14 =40X8-0X8 =36X9-26X9 =97 X1517X

12、15 =55 X57-35X57 =72 X88-2X88 =13X82-3X82 =66 X62-6X62 =79 X7219X72 =57 X36-7>6 =80 X56-40X56 =30 X1 -10X1 =56 X19-36 X19 =96 X87-16X87 =93 X50 - 33 X50 =63 X80 - 53 X80 =76 X86 56X86 =45 X53-25X53 =57 X66-7X66 =90X41 -20X41 =83 X63-63X63 =86 X60-6X60 =74X21 -64X21 =21/36564 X89+564 =88 X90 - 48

13、X90 =70X6-20X6 =83X5 33 溝=40 >05-30X95 =67 X8217X82 =77X23-57X23 =72 X42-12X42 =44 X53-4>53 =83 X13-63 X13 =65 X16-45 X16 =48 X99-8X99 =56X4-16X4 =98 X93 - 38 X93 =22 /3673 X40-13X40 =92 X92 - 32 X92 =86 X1O-16X1O =75 X18-15X18 =83 X95 - 33 X95 =99X27-79X27 =96X4-76X4 =21 X53-11 X53 =66X27-46X

14、27 =65 X68 25X68 =79 X24 59X24 =36 X80-16X80 =83 >02-13X92 =75 X49-35X49 =92 X72 42X72 =59 X89-9X89 =73 X38-3>8 =84 X24 74X24 =62 X76 32X76 =95 X64-75X64 =80 X93-40X93 =98 X1718X17 =33 X1 13X1 =57 X24-17X24 =55 X78 35X78 =48X81-8X81 =25 / 3695 X98 - 65 X98 =52 X75-32X75 =67 X64-27X64 =90 X36 -

15、 50 X36 =21 X14-1 X14 =64X61-14X61 =67 X55-17X55 =98 X87 28X87 =94 X80 - 44 X80 =92 X47 42X47 =68 X64 38X64 =79 X94 - 49 X94 =86 X68 46X68 =71 X14-31 X14 =26/36376 X59+376 =77X41-67X41 =92 X33-72X33 =95X31-65X31 =62 X74 42X74 =31 X47-1 X47 =58 X93-8X93 =91 X38-51 X38 =87 X50-57X50 =63 X74 43X74 =51

16、X63-11 X63 =46 X86-16X86 =23X2-3> =939 Xl9+939 =96 X98-56X98 =86 X40-6X40 =47X8-27X8 =33 X10-23 X10 =21X61-1X61 =84 X12-54 X12 =61X81-11X81 =84 X42 74X42 =82 X59-22X59 =94 X35-44X35 =74 X60-14X60 =82 X98-52X98 =79 X59-29X59 =29 / 3699 X14-29 X14 =91 X99-71 X99 =81 X86-41 X86 =53 X62-3X62 =96 X49-

17、36X49 =50X23-40X23 =97X3-77 > =69X31-19X31 =50 X26-20X26 =99 X129X1 =51 X92-1 X92 =87 X1017X10 =71X61-31X61 =60 X12-20 X12 =54 X19-34 X19 =74 X69-14X69 =86 X68-36X68 =96 X12-46 X12 =68X25-38X25 =40 X26-30X26 =53 X62-3X62 =49 X47-29X47 =74X21-4X21 =93 X19 3X19 =58 X95-8X95 =91 X74-51 X74 =32 / 368

18、1 X7-11 X7 =99 ><35-69X35 =70 X73 0X73 =41 X39-31 X39 =90 X55-60X55 =90 X38-20X38 =74X8-54X8 =28X98-8X98 =95X21-25X21 =66 X99-16X99 =24X28-4X28 =92 X40-52X40 =66 X67-6X67 =78X31-58X31 =462X29+462 =92X41-12X41 =721 X69+721 =80 X99-20X99 =253X29+253 =985X9 + 985 =508 X19+508 =81 X99-11 X99 =898

19、X89+898 =884 X49+884 =93 X54-13X54 =57 X69-37X69 =35 / 3682X9 + 82 =91 X19-1 M9 =285 刈9+285 =213X89+213 =211X49+211 =701 X49+701 =37 X1-7X1 =846 X89+846 =598 X59+598 =79X21-19X21 =51 X98-21 X98 =263 刈9+263 =388 X79+388 =64 >07 - 54 X97 =36 /36344 X69+344 =80X25-50X25 =311X89+311 =90X31-10X31 =33 X37-13X37 =93 X38-13X38 =91 X32-1 3 =52X29 + 52 =944 X9 + 944 =70 X79 + 70 =60 X19 + 60 =137X29+ 137 =301 X79+301 =85X25 25X25 =37 / 3695X91-55X91 =610X39+610 =81 X35-21 X35 =88 X54 - 68 X54 =261 X29+261 =30