1/3 + 2/5 1 3/4 - 1/5 5,34 - 2,83

1/3 + 2/5
= 5/15 + 6/15
= 11/15

1 3/4 - 1/5
= 7/4 - 1/5
= 35/20 - 4/20
= 31/20
= 1 11/20

5,34 - 2,83
= 2,51

1. 1/3+3/5 = 5/15+9/15=24/15
2. 1 3/4-1/5=7/4-1/5=35/20-4/20=31/20
3. 5,34-2,83=2.51