4分之3-5分之2+4分之1
=1/4+3/4-2/5
=1-2/5
=3/5
8分之7-(6分之5-4分之1)
=7/8-(10/12-3/12)
=7/8-7/12
=21/24-14/24
=7/24
6分之7-7分之2-7分之5
=7/6-(2/7+5/7)
=7/6-1
=1/6
1-(12分之5+3分之1)
=1-(5/12+4/12)
=1-9/12
=3/12
=1/4
9分之4+3分之1+6分之5
=8/18+9/18+15/18
=32/18
=16/9
4分之3-5分之2+4分之1
=1/4+3/4-2/5
=1-2/5
=3/5
8分之7-(6分之5-4分之1)
=7/8-(10/12-3/12)
=7/8-7/12
=21/24-14/24
=7/24
6分之7-7分之2-7分之5
=7/6-(2/7+5/7)
=7/6-1
=1/6
1-(12分之5+3分之1)
=1-(5/12+4/12)
=1-9/12
=3/12
=1/4
9分之4+3分之1+6分之5
=8/18+9/18+15/18
=32/18
=16/9