Задача Задача №3602396
А
А
61
Explanation: 21 + 21 = 42, and 42 + 19 = 61. Quick check: 19 = 20 - 1, so 42 + 20 = 62, minus 1 = 61. Want more practice problems?
61
Explanation: 21 + 21 = 42, and 42 + 19 = 61. Quick check: 19 = 20 - 1, so 42 + 20 = 62, minus 1 = 61. Want more practice problems?