Question

1) - 2/3 + 5/6 =

2) 3, 8 + (- 8, 9) =

3) - 7/15 + (- 2/3) =

6) 2, 5 - 85 =

4) - 5/12 - 4/15 =

5) 3/10 - 2/15 =

Answer 1

1)-2/3+5/6=-4/6+5/6=1/6

2)3,8+(-8,9)=3,8-8,9=-5,1

3)-7/15+(-2/3)=-7/15-2/3=-7/15-10/15=-17/15=1 2/15

6)2,5-85=82,5

4)-5/12-4/15=-25/30-8/30=-33/30= -1

3/30= -1 1/10= -1,1

5)3/10-2/15=9/30-4/30= 5/30= 1/6