5分之3×4分之9×7分之5,1-2分之1-3分之1,3分之1÷5分之6×10分之9要算式还有一个2÷3分之2-3分之2÷2

3/5*9/4*5/7
=27/28
1-1/2-1/3
=(6-3-2)/6
=1/6
1/3÷6/5*9/10
=1/3*5/6*9/10
=1/4

5分之3×4分之9×7分之5
=3*9*5/5*4*7
=27/28
1-2分之1-3分之1
=1/2-1/3
=3/6-2/6
=1/6
3分之1÷5分之6×10分之9
=1/3*6/5*9/10
=1*6*9/3*5*10
=9/25

5分之3×4分之9×7分之5
=3/5×9/4×5/7
=3×9/4×7
=27/28
1-2分之1-3分之1
=1-1/2-1/3
=1-（1/2+1/3）
=1-（3/6+2/6）
=1-5/6
=1/6
3分之1÷5分之6×10分之9
=1/3÷6/5×9/10
=1/3×5/6×9/10
=1/4
2÷3分之2-3分之2÷2
=2÷2/3-2/3÷2
=2×3/2-3/2×1/2
=3/2×（3/2-1/2）
=3/2×1
=3/2

5分之3×4分之9×7分之5
解，得：
(3/5)*(9/4)*(5/7)
==(3/7)(9/4)
==27/28

1-2分之1-3分之1
解，得：
1-(1/2)-(1/3)
==(1/2)-(1/3)
==1/6

3分之1÷5分之6×10分之9
解，得：
(1/3)/(6/5)*(9/10)
==(3/10)(6/5)
==9/25

2÷3分之2-3分之2÷2
2/(2/3)-(2/3)/2
==3-(1/3)
==8/3