Fill in the Blanks SUMASOnline version RESUELVE LAS SIGUIENTES ADICIONES. by Karina Viteri 1 12 + 3 = 6 + 5 = 5 + 5 = 20 + 10 = 1 + 2 = 12 + 8 = 7 + 9 = 20 + 7 = 3 + 3 = 2 + 7 = 9