TAREA 10 BLOQUE TERCERO

5/7 +1/3 = 15/21  + 7/21 =22/21
2/3 + 1/4=  8/12   +3/12  =11/12
1/2 + 3/8 = 4/8     + 3/8   =7/8
2/5 + 2/4 = 8/20   +10/20=18/20
3/3 + 2/8 =24/24  +6/24  =30/24