1、(1/6-1/12)×24-4/5
=1/6×24-1/12×24-4/5
=4-2-4/5
=2-4/5
=6/5
2、设这个数为x,那么得到1/2+2/3=2/3x
x=(1/2+2/3)÷2/3
=(1/2+2/3)×3/2
=1/2×3/2+2/3×3/2
=3/4+1
=7/4
3、6×1/12-1/2x=1/2
1/2-1/2x=1/2
x=0
4、(5/7×4/7+4/7)÷4/7
=4/7(5/7+1)÷4/7
=5/7+1
=12/7
1、(1/6-1/12)×24-4/5
=1/6×24-1/12×24-4/5
=4-2-4/5
=2-4/5
=6/5
2、设这个数为x,那么得到1/2+2/3=2/3x
x=(1/2+2/3)÷2/3
=(1/2+2/3)×3/2
=1/2×3/2+2/3×3/2
=3/4+1
=7/4
3、6×1/12-1/2x=1/2
1/2-1/2x=1/2
x=0
4、(5/7×4/7+4/7)÷4/7
=4/7(5/7+1)÷4/7
=5/7+1
=12/7