20 chocolates
22 juguetes
16 carros
30 canicas
18 manzanas
15+15, 25+5, 19+1+10, 50-20, 34-4, 40-10
9+9, 10+8, 15+3, 28-10, 21-3, 19-1
8+8, 10+6, 12+4, 26-10, 20-4, 19-3
10+10, 15+5, 19+1, 21-1, 30-10, 40-20
12+10, 20+5+7, 20+2, 23-1, 29-7, 32-20