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15分之8乘大扩号6分之5除小扩号9分之7减3分之1小扩...

8分之3、6分之18、9分之13、15分之4、7分之5、5分之25、1又3分之2、10分之4、3分之2从小到大排列 15分之4

(9/10×7/8×13/6)÷(13/3×7/16×18/5) =(9/10÷18/5)×(7/8÷7/16)×(13/6÷13/3) =1/4×2×1/2 =1/4

21/22×【(5/6-4/9)÷7/11】 =21/22×【7/18÷7/11】 =21/22×11/18 =7/12

1/5÷(7/9-1/3)x1/4 =1/5÷4/9x1/4 =1/5x9/4x1/4 =9/20x1/4 =9/80

(9分之8+1又7分之3+10分之6)除以(11分之3+7分之5+9分之4) =(8/9+10/7+6/10)除以(3/11+5/7+4/9) =(560/630+900/630+378/630)除以(189/693+495/693+308/693) =(1838/630)除以(993/693) =(1838/630)X(693/993) =(919/105)X(...

解: 先通分,然后比大小, 因为,5/4=300/240, 13/12=260/240, 9/8=270/240, 4/5=192/240, 3/4=180/240, 7/6=280/240 所以,从大到小的顺序为: 5/4, 7/6, 9/8, 13/12, 4/5, 3/4.

5/14÷{6/7×(4/9+1/6)} =5/14÷[6/7×11/18] =5/14×21/11 =15/22

8/15÷2/9÷4/5 =8/15×9/2×5/4 =8/15×5/4×9/2 =2/3×9/2 =3 (7/8+3/4)÷1/4 =7/8÷1/4+3/4÷1/4 =7/2+3 =13/2 =6.5 8/13÷7+1/7×6/13 =8/13×1/7+1/7×6/13 =(8/13+6/13)×1/7 =14/13×1/7 =2/13

12.6+4.5÷3-12.7 =12.6+1.5-12.7 =14.1-12.7 =1.6 0.87÷(1-1/3×2) =0.87÷(1-2/3) =0.87÷1/3 =2.61 72×(3/8+2/9) =72×3/8+72×2/9 =27+16 =43 9.37-(1.37+0.45) =9.37-1.37-0.45 =8-0.45 =7.55

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