唔該!!!!!!!``maths題~~~~+ - 數.......求下你地牙@@唔該''''天日要交la

1) (-1/2) 1/2
=0
2) (-1/2)-(-1/2)
=0
3) 1/5 (-1/3)
=-2/15
4) 1/20-(-2/3)
=43/60
5) -1/8 (-1/6)
=-7/24
6) (-2) (-1/3)-5又1/3
=-7又2/3
7) 8 (-1/4)-(-3/4)
=8又1/2
8) (-6) (4又2/3)-(-1/3)
=-1
9) (-3/6) (-1/5)-(-1/3)
=-11/30
10) (-1/5) (-5/6)-2/3
=-1又11/30