1、21分数乘除法简便运算100题有答案分数乘除法简便运算100题/厂、23536762(5) 2x 4+27 x4(6) 13x 5-13 x5(7)753 34 3312 x6 -12 x6（一）一 +一x 7 + 一x 7(9)37x3356(10) 25x 24153103377(11)x21+4x214 4(12) 10x 101-103)18 一 9X8 一 9-8 一 9X8 一 93_ 5+99X3_ 54T(15) ( 7 + 8 ) x 7 x 9(16) 34 x 25(17)3436 x 358)TX5 - 9-5 - 6(19)(21)10(22)(20)23255355
2、73 7 4 7(23)787 8(25)320 -567121(24) 9999(26) 55459129123(27)8(28) 633762(29)(30)29x (152931(31)15(32) 25811(33)54 x(34)12182472(35)110.375111925212519531115313 1(37)6848(38)126424 247112543265578 157(39)95911(40)34335551 1 1-88 _ (41)88(42)79127 9 125353344 240.6(43)353(44) 6.8x+ 1x3.2(45)4101 x455
3、25(46)5+ 5 x15(47)8_8-88815(48)1x6 +2 x6(49 )(90 + )x,丄373788897(36)43(50)3+二(51)A X9 +5 亠10(52)18X(4+-)15162799 6(53)2 22 X 7+2X 5(54)(丄-丄）X(24-)336125(55)(5 X4 +4)亠4. (56)1 r (-+-)X 1777753 513(57)33 X7 + 土X 3?(58) 3331X 38111183(61)(32 X1 + 17) r 2(62) (25 + 34)r丄+ 141244(63)18 X9+ -1X 9 +9251625
4、16165435 1131663 (-)(65)()(64)92178 2342326 x 24 131 3X 39 + X 25 + (95) 4 44 2 3 1 17(96)1 X( 2 三- )+ 15 - -17 3 4 12 21(97)2000 - 2000-200020011993 1994 1(98)1993 1992 19943 2 2(99)3 X 25 + 37.9 X 65 5 52 2 5 5(100)(9彳+7 )*(3 +3)7 9 7 9分数乘除法简便运算100题答案(3)(1)(9 +27)%3 %9 =31(7 -(2)336(8-8)%15 =0(4)5
5、5516 %9 +9 % 6 =676 2(6) 13% 5-13 % 5111363 一 4X+3- 4X2一 95TX5-12-6X33433(8) 8 +8% 7+ _8% 73一35X37=5（15 321 % 410 321 % 4 -3_!4 = 7(10)625%24625%(25-1 )192577(12)%10101- 10 =70100 - 9X00 - 98 89 x 9 =04 8(16) ( 7 + 9)x 7 x 9=92I iz(16) 3 x25=95(17)3436 X 355(18) ( 6 -18气=1=(35+1)3435=343435(19) 26彳
6、x2(20) 325=(25+3)x 130+12 )2721)1025=1723)374778=8725：)352056：12丄222179999 =55545 =91291237 =37 3762 62226)3(27)83x 3 =0(28)63(29)(30) 29 x (15 x詈)3031(32)(33) 54x( 8 -6)=33(32) 254 x 4= 10311 Z _5 丄(34) 12 18 24 了亠低(36)350.375 2 3 -811113=0531(38) 6848=58(38)519,21419(36)72525=1957115313112642424=7
7、71125(39) 95911 = 5(40)113388(42) 88=64(42)3353-44 2450.6(43)353=6034 3 =7505551 1 179127 9 12 =54 3 4265 578 157 -(45)6.8 乂 + - X3.2 =25 55 5(46) + X15 =10 (47)88 8(48) 1 X6 + - X6 = - (493 7 3 7 7(45)4101 V=16上252581*8=1 15151、 11)(90 +)X =1 88 8988(50) - X 3 +5 X -7 8 8 7=7(51)8 X 5+ 5*巴115 16 27
8、9 =:3(53)2 22 X 7+2 X 5=83 3/ 14=1 15(55)(5 x 4 + 4)亠4127 7 77=7(57)33 X 7 + AX 33=338 11 1188(59)5 _5959 12 125 =9(52)18X4 + - ) =2396(54)(1 -丄)X( 24 -)6125(56) 5 r( f+i)X 113=31(58) 333- X 3 =1000(62) (32 X 1 + 17) - 4 12=60(60)2 5253 456=1(62)(25+ -)1* +1 丄444=1034(63)18 X9+ -上X旦+ 19251625 16 16=
9、863 (-43)=20(64)9217(67)(21 X3 + 41X21) X 1 =_217744(65)吟（2 3）；理=o9 1(67)( 99+ 局 “ 9 =叫(69)兰-(4+2 )X卩=7155311105 6X-9亠9=1(70) 6 5 10 5 2(69) ( 5 + - ) X 30 =496 51 1 1(71) - X58+ X41 + 8 8 8 =12.5(73) 4 X4 X 5 5 7 412 = 14(73)4 _X5+ 2 亠 3 =45 5 345(74)十(-583(75) 5153 -0.6 X 53=60,7 23+ 10201(77)11 3
10、 10【2飞X)=32(78)(15X 11=67(79)3739(80)444446 X =444545(81) 200820062007=2006遊2007(82)712522(83)91013X仃_9+ 104 9X = X 17 10(84)36 x 37 =2837(85)1113111313X 332033(86)25X01丄25=28(87)-7(88)_5=9(89) 17X_916(91) X 3745=(1- ) X 37 45(92) 2004X 672003(2003+1)/ 672003=1 X 37 - X 3745=200367200320038=36 -451(
11、93)73 X=6767200315816、1(72 +)X -158116172 X+X81581=9?15(94) 166 - 4120=(164 + 41) X 丄20 41=164 X +1=2000 -200020012000201 X 39 + (95) 4X 25 + 26 x 244133一 33 26= X13 + -X 25 +X 444 13=X(13 + 25 + 2)43 = X 404=304/C 23、“ 117(96)1 -(2 -)+ 15 17341221= 21,11“ 121X 1 +15 一-X 17121217=21宀111、X( 1 + 15)17
12、1212=21(97)2000 - 2000-200020012001=200020012000 2002=200120021993 1994 1(98) 1993 1992 1994=(1992 1) 1994 11993 1992 1994=1992 1994 19931993 1992 1994=1322(99)3X 25-+ 37.9 X6-555=332X 25-2+ (25-+12.5 ) X6-55553小2小 2小2 八2=3X 25-+ 25 X6 + 12.5X 6 55555=(3.6+6.4)X 25.4 + 12.5 X 8X 0.8=254 + 80=3342 2 5 5(100) ( 9 三+7 )*(兰 + 工)7 9 7 9=(65 + 65 )*( )7 9 7 91 1 1 1=65 X (丄 + 丄)-5 X (丄 +丄)7 9 7 9=65 - 5
