1、分数乘除法简便运算 100 题(1) ( + )3 9 (2) ( - ) 89 427 3838 615(3) (7 - ) (4) + 16 23 56 59 59 16(5) + (6) - 29 34 527 34 613 75 613 25(7) 6 - 6 (8) + + 712 512 3838 4738 37(9) 37 (10) 24 335 625(11) + - (12) 101- 1521 34 1021 34 34 710 710(13) (14) 99 + 89 89 89 89 35 35(15) ( + )7 9 (16)3 25 47 89 45(17) 36
2、 (18) ( - ) 3435 56 59 185(19)26 (20)32 23 15 25 56(21) (22) 20 73(23) (24) 8743 9127(25) (26) 6520 125495(27) - - (28) 38 38 47 38 37 6237(29) (30) (15 ) 31762229 2931(31) (32)25 458 23 815 34(33)54( - ) (34)89 56 72145812(35) (36) 381237.018 957(37) (38) 465 24136512(39) (40) 19257 35783(41) (42)
3、83 12912957(43) 6.035245(44)6.8 3.2 (45) 101 1254(46) 15 (47)8 885 18(48) (49) ( 90 ) 37629(50) + 573857(51) + (52)18 ( + )1621094956(53) 7+ 5 (54) ( )(24 )3 124(55) ( + ) (56) ( + ) 747531(57) (58) 3 81833(59) (60) 592795 65243(61) (32 17) (62) (25 ) 41 14(63) 25867196(64) (65) )39( 236)(85(66) (21
4、 21) (67) (99 )9 74410(68) ( ) (69)( )30 1543210654(70) (71) 58 41609818(72) (73) 5472546253(74) ( ) (75)153 0.65381535(76)( ) (77) ( ) 45 14 73 710 18 12 35 109(78) ( )1511 (79)215 311 347(80) 46 (81) 2008 4520062007(82) (83) 47 1522 712 910 1317 910 417(84)36 (85) 937 1113 1113 1333(86) 101- (87)
5、25 9574(88) (89)17 59 34 59 14 916(91) 37 (92)2004 203(93)73 158(94) 166 41 20(95)39 + 25 + 4342613(96)1 (2 - )+ 15 17327(97)20002000 0(98)1942193(99)3 25 + 37.9655(100)(9 +7 )( + )779分数乘除法简便运算 100 题答案(1) ( + )3 9 =31 (2) ( - ) =0 89 427 3838 615(3) (7 - )= (4) + = 16 23 18956 59 59 16 59(5) + = (6)
6、 - = 29 34 527 34 61613 75 613 25 613(7) 6 - 6 =1 (8 ) + + = 712 512 3838 4738 37(9) 37 = 3 (10) 24 335 625= (25-1) 625=519(12) + - = (12) 101- =70 1521 34 1021 34 34 7710 710(14) =0 (14) 99 + =60 89 89 89 89 35 35(16)( + )7 9=92 (16)3 25=95 47 89 45(17) 36 (18) ( - ) =1 3435 56 59 185=(35+1)3435= 3
7、4(19)26 (20)32 23 15 25 56=(25+ ) =(30+ ) 15 156=5 =2731(21) = (22 ) =7 52071 5731(23) = (24) =5 874 921(25) =12 (26) = 652031 12545(27) - - =0 (28) =37 38 38 47 38 37 6237(29) = (30) (15 ) = 317626229 2931 0(32) = (32)25 4= 103 58 23 815 934(33)54( - )=3 (34) =10989 56 7215812(36) =0 (36) =19 38123
8、7.01 94775(38) =58 (38) =7 4865 2136512(39) = (40) =750192575 341578345(42) =64 (42) =5 83 29297(43) =606.035245(45) 6.8 3.2 =2 (45) 101 =16 51 254(46) 15 =10 (47)8 8=18 18(48) = (49) ( 90 ) = 1 317627698(50) + =585(51) + = (52)18( + )=231562710934956(53) 7+ 5 =8 (54) ( )(24 )3 124=1 154(55) ( + ) =
9、 (56) ( + ) =3747121531(57) = (58) 3 =1000831748331(59) = (60) =159295 6524(62) (32 17) =60 (62) (25 ) =103 41 3141(63) =2586971698(64) =20 (65) =0)34( 23164)(85(67) (21 21) = (67) (99 )9 =11742091(69) ( ) = (69)( )30 =49 15432107654(70) = (71) 58 41 =12.56098181(73) =(73) = 5472145462534(74) ( )】=
10、4 (75)153 0.653=608535(76)( ) = (77) ( ) =45 14 73 710 218 12 35 109 2(78) ( )1511 =67 (79) =3215 311 347(80) 46 =44 (81) 2008 =2006 4520062007 20(82) = (83) =47 1522 712 910 1317 910 417 910(84)36 = (85) = 937 81113 1113 1333 2(86) 101- =28 (87) =25 9574(88) = (89)17 = 9 59 34 59 1459 916(91) 37 (9
11、2)200445 2037=(1- )37 = (2003+1)1 6= 137 - 37 = 2003 + 1 2037= 36 =674582037(93)73 1= (72 + ) 68= 72 + 51= 912(94) 166 41 0= (164 + )241= 164 + = 4 01(95)39 + 25 + 432613= 13 + 25 + 4343126= (13 + 25 + 2)= 40 = 30(96)1 (2 - )+ 15 17434127= 1 + 15 = (1 + 15 )2= 21(97)20002000 0= 2000 210= 2000 = 201(98)194193= 2)(= 1941933= 1(99)3 25 + 37.965252= 3 25 + (25 +12.5)6= 3 25 + 25 6 + 12.56 52= (3.6+6.4)25.4 + 12.580.8= 254 + 80= 334