Question

Помогите пожалуйста

Answer 1

Здравствуйте!


$1) \: 65 + 9 + 5 = 65 + 5 + 9 = 70 + 9 = 79 \\ 2) \: 76 + 8 + 4 = 76 + 4 + 8 = 80 + 8 = 88 \\ 3) \: 20 + 7 + 3 + 30 = (20 + 30) + (7 + 3) = 50 + 10 = 60$
$4) \: 36 + 8 + 2 = (8 + 2) + 36 = 36 + 10 = 46 \\ 5) \: 47 + 6 + 4 = (6 + 4) + 47 = 10 + 47 = 57 \\ 6) \: 50 + 9 + 1 + 40 = (9 + 1) + (40 + 50) = 10 + 90 = 100$

Удачи в учебе!