Вычислите: 16 + 42; 46 + 24; 45 − 16; 45 − 22; 43 + 41; 45 + 40; 34 + 43; 35 + 6; 3 + 25; 14 + 49; 24 + 30; 32 + 26; 19 − 18; 31 + 66; 25 + 42; 20 + 9; 8 + 45.

Вычисляем по порядку:

16 + 42 = 58; 46 + 24 = 70; 45 − 16 = 29; 45 − 22 = 23; 43 + 41 = 84; 45 + 40 = 85; 34 + 43 = 77; 35 + 6 = 41; 3 + 25 = 28; 14 + 49 = 63; 24 + 30 = 54; 32 + 26 = 58; 19 − 18 = 1; 31 + 66 = 97; 25 + 42 = 67; 20 + 9 = 29; 8 + 45 = 53.