Oblicz: `1/6 + 3/6 =`
Oblicz: `5/8 + 2/8 =`
Oblicz: `5/16 + 7/16 =`
Oblicz: `6/10 + 7/20 =`  
Oblicz: `2/3 + 1/4 =`  
Oblicz: `1/3 + 7/40 =`
Oblicz: `3/7 + 1/2 =`
Oblicz: `7/12`+`2/7` =
Oblicz: `1/4`+`5/9` =
Oblicz: `2/5` + `4/8` =