分数乘除法简便运算100题

1、(4) (10) (13) (16) 分数乘除法简便运算 100题 8 4 3 3 6 9 + 97 )x 3 x 9 (9) (8 - 8 ) x 15 (1) 2 (5) 9 x- + 4 97 19 6 95 4 35 19 3 3 4 3 3 (8) ; + x- + - x- 丿8 8 7 8 7 x 94 x 95 153 103 91 x 4 - 1 2 (3)x(7 - 3) (6) 6769 x_ -x 135135 (9) 37 x 3 35 x 101- 33 (14) x 99 + : 55 (15) ( 7 + 8 ) x 7 x 9 (17) 36 34 35 95

2、 (90)399 x5 5518 (18)( 6 - 5)x T 35 55 (22)7 (23) 35 (25)320 5 56 374 7 787 8 5 5 4 5 (26) 9 12 9 12 7 1 2 1 (24) 99 9 9 3 4 3 3 X- X- 8 7 8 7 3 (27)8 - (28) 63 37 62 1 _ 空+ ?- -6 3 73 7 (29) 2 (3)29 (31) 5 2 8 -x- X 8 315 (32) 254 X 4 (33) 54X(8 - 11 Z _5_ (34)12 18 24 1 72 35_ (35) 8 11 0.375 2- 1

3、1 5 (36)7 1921 419 2525 5 3丄 (37)6 848(38) 11 5 3 131 7 11 2 5 12 6 4 2424(39) 9 5 9 11 (40) 4 3 265 - 578 - 3 4 157 4 3 (41) 8(42) 5 5 _5111 7 9 127 9 12 33 5 3 44 24 5 0.6 353 1 1 (44) 8X 5 + 5 X (45) 101 X 25 55 8 1 6 2 6 (46) 8 + 8 x 15 (47)8 15 宁 8 (48) 3 x 7 + 3 x 7 1 15 355 85510 (49) (90 + 8

4、8 ) x 89(50) 7 x 8+8 x 7 (51) 15 x 16 + 27 + 9 (52) 18X (9+6 ) (53) 2 7+- x 5 3 (54) 12 x( 24 -) 5 (55) (56) 1 2+1 3 13 (57) 33 8 11 x 33 8 (58) (59) 12 12 (60) (61) 15 (32 x 丄 + 17)- 12 3 1 (62) (25+ ) + 4 4 (63) 虫x 25 2 + 16 25 x +-9 16 16 63 (5 921 5113 (65)8 (2 3 3 23 3 (21x - + - x 21) (66) 9 (

5、67) (99+ )- 9 10 (68) 144210 14 - ( 4 + 2 )X 上 15 311 5 x 6 (70) 65 105 5 4 (69)(- + - )X 30 6 5 4451 X工X二(80) (72)5742 44 46 X 44 45 4 52 . 3八 4 r / 5 (73) X + -(74) r ( 5 65 5 5 8 丄)-5 3 X 153 - X 53(81) 28(75)5 2008X 2006 2007 1 1 3 10 (77)8 X 2 (5 X 9-) 23 (78)(石 + 石)X 15 X 11 (79) 37 14 39 4 15

6、 7 X X 7 22 12 (82) (83 91394 190 X 石 +190 X 后 (84) 36 X 37 (85) 11 13 11 13 13 33 (86) X 101- 87 17 (91) 2525 5 - 9 3 - 7 5 - 9 4 - 7 1一 4 X 5- 9 + 3 一 4 X 5- 9 (89) 9 17X 196 44 X 37 (92) 2004X 67 2003 (93)73 X - 158 (94) 166 1 “ 3 门 26 3 4 2 3、 ,1 17 X 39 + X 25 + X (96)1X (2 - ) + 15十 (95) 4 4 4

7、 13 17 3 4 12 21 (97)2000 - 2000 2001 1993 1994 1 (98) 19931992 1994 (99)3 3 X 25 + X 6 555 (100) 2 2 (9_+7 ) (1) X 9 =31 (3) 1 6 X( 7 - 18 (5) 2 X 3 + 4 27 11 36 (7) 12 12 6 =1 (9) 3 37 X 35 = 3 35 =5 (11) 15 21 3 X 4 10 21 3 X- 4 (14) (15) 分数乘除法简便运算100题答案 3 (2)(8 - (4) (6) (8) 13 +_ 8 8 6 （10）方 25

8、 19 25 )X 15 =0 13 24 (25-1 ) 13 3 (14) 3 (4 + 8 ) X 7 X 9=92 （ 7 X101- 17 =70 X 99 + 3 =60 5 35 X25=95 (17) 34 36 x 35 5518 (18) ( 5 - 9)x 亏=1 (35+1) 34 35 =34 34 35 (19) 262 X 1 25 (2)325 x6 12 (30+12 ) 5 =5 1 3 1 1 1 =27 (21) 10 2 5 = 1 7 3 7 4 7 _8 (23) 7 8 7 8 = 7 (25) 3 20 5 =12- 5 6 2 (27) 33

9、 4 3 3小 8 - 8 x - 7 x 8 3 =0 (29) 1 . 6 2 .6 =7 _ + 3 7 3 .7 =6 (31) 5 2 8 2 8 x 3 x 15 9 8 5 (33) 54 x (8 - 6 )=3 x (25+i) 3 5 0.375 8 11 11 2色 5 35 5 (22) 7 =7 - 7 7 1 2 1 (24) 9 9 9 9 =5 5 5 4 5 12 (26) 9 12 9 12 5 (28) 63 37 =37远 62 62 2 29 30 (30) 29 x (15 x习 )= 31 (32) 254 x 4= 103 11751 (34)1

10、2 18 2472 =109 (35) 19 3 =0 (36) 25 21 25 19 =19 11 13 (37)6848 =58 (38) 72_5 (39)959 11 = (40) 4 3 4 265 - 578 157 3 4 3=750 12642424 =7 3 3 5 5 5 1 1 1 8 8 (41) 8 8 =64 (42) 7 9 12 7 9 12=5 33 5 3 -44 24 5 0.6 (43) 3 5 3 =60 (44) X 1 + 1 x =2 (45) 4 101X =16兰 5 5 25 25 (46)5 + X 15 =10 (47)8 -8=1

11、1 8 8 15 15 1 v 6 2、 ,6 6 1 1 1 (48)- X - + _ X _ = (49 )(90 + ) X= 1 3 7 3 7 7 88 89 88 (50) X 3+5 X 5 7 8 8 7 : =7 (51) 旦X A + 5 + 10 1 (52) 18 X (4+-) =23 15 16 27 9=3 9 6 (53) 2 X 7+2 X 5 =8 3 3 (55) (5 X 4 + 4)- 4 12 7 7 7 7 : =7 (57) 33 X 1 + 1 X 33 =3? 8 11 11 8 8 (59) 5 7 59 5 9 12 :125 = 9

12、(61) (32 X 1 1 + 17)- 5 4 12 =60 (63) 18 X 9 + 7 X 2 + 9 9 25 1625 16 16： =8 5 3) 63 (- =20 (64) 9 21 7 (66) (21 X 34 3 + - X 21) X 1 21 77 4 4 (54) ( 1 丄)X( 24 - ) =114 612515 (56) 1 - (-+-)X 丄=3 53 513 1 (58) 333 X 3 =1000 3 (60)225 3456=1 3 (62) (25+ ) .1 + 1 1 4 4 4 =103 4 / 、5 1 1 3 16 (65)- (-

13、 -)- 8 2 34 23 =0 (67) (99+ -)- 1 9 =11 1 10 9 14 (68)兰 r 15 10= 7 10 (69) 5 x 6 (70) 65 9 . 9 10 5 (71) 5 4 (5 + 4 )X 30 =49 6 5 111 X 58+ X 41 + 888 = ,C、4 4 5 1 1 (73) (72) X X 5 7 4 2 : =14 4 4 5 2亠 3 _ _ 4 _ X _ + 5 6 5 5 3 3 (75) 4 1 7 7 23 (76) (5 + 4) 匸3 +和= , 20 (77) 2 3 (78)( 15 +右 )X 1 5X

14、 11 =67 (79) (74) (1 -1心 2 5 (80) 1 3 10 X 2 X 9 ) X 153 X 53=60 5 i 8 3 32 37 14 =3聖 3939 4444 46 X 44 =44! 45 (81) 2006 2008X 2006 =2006 2006 2007 4 15 7 5 (82) 7 X 22 X= 12 22 (83 9 _ 28 (84) 36 X 37 = 37 (86) 7 X 101- =28 25 25 5 3 5 1 5 (88) 9 X 4 + 9 X 4 = =9 45 (89) 17X 16 = 9 16 16 44 X 37 4

15、5 9 13 9 4 9 ) X + 二 X 10 17 10 17 10 11 11 13 20 (85) 13 - X= 33 33 4 5 3 5 5 (87) 7 9 7 9 9 (91) G7 (92) 2004X 2003 =(1- )X 37 45 (2003+1)X 67 2003 =1 X 37 - X 37 45 =2003 X空 2003 + 1 X旦 2003 =36 45 1 (93)73 X =67 67 2003 15 8 16、 1 (72 + ) X - 15 8 1 16 1 72 X + X 8 15 8 1 =9 15 “41、 1 (164 +) X

16、20 41 1 41、/ 54 X+ 41 20 (94) 166 - 41 20 1 =4 20 丄 X 39 + 3 X 25 + 26 X 9 (95) 44413 =3 X 13 + 3 X 25 +3 X 26 44413 3 = X( 13 + 25 + 2) 4 =3 X 40 4 =30 4 2 3、 1 17 (96)1X (2 - ) + 15十 17 3 4 12 21 21 ,11 “ 1 21 =X 1 + 15 X 17 12 12 17 21 “11 1、 =X (1 - + 15 ) 17 12 12 =21 (97)2000 - 2000 2000 2001 =2000 - =2000 =2001 2002 2000 2001 2000 2001 亠 2001 2000 2002 1993 1994 1 (98) 19931992 1994 =(1992 1) 19941 1993 1992 1994 1992 19941993