Calcul Mental - Addition

152 + 396 + 785 + 20 = 1 325 1 353 1 420 1 533

5 + 5 + 5 + 5 + 5 + 6 = 29 30 31 32

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 44 45 46 50

2 500 + 4 956 = 7 356 7 396 7 456 7 486

4 + 4 = 10 4 6 8