Вычисли, рассуждая по образцу. Образец
60 + 18 = 60 + (10 + 8) = (60 + 10) + 8 = 78

30 + 22 50 + 29 40 + 34
50 + 16 50 + 47 60 + 12

52, 79, 74

Пошаговое объяснение:

30 + 22 = 30+(20 + 2) = (30 + 20) + 2 = 52

50 + 29 = 50 + (20 + 9) = (50 + 20) + 9 = 79

40 + 34 = 40 + (30 + 4) = (40 + 30) + 4 = 74

50 + 16 = 50 + (10 + 6) = (50 + 10) + 6 = 66

50 + 47 = 50 + (40 + 7) = (50 + 40) + 7 = 97

60 + 12 = 60 + (10 + 2) = (60 + 10) + 2 = 72

Можно лучший?

Пошаговое объяснение:

30 + 22 = 30 + (20 + 2) = (30 + 20) + 2 = 52

50 + 29 = 50 + (20 + 9) = (50 + 20) + 9 = 79

40 + 34 = 40 + (30 + 4) = (40 + 30) + 4 = 74

50 + 16 = 50 + (10 + 6) = (50 + 10) + 6 = 66

50 + 47 = 50 + (40 + 7) = (50 + 40) + 7 = 97

60 + 12 = 60 + (10 + 2) = (60 + 10) + 2 = 72