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3 Responses
Yes-add minutes first: 45 + 35 = 80, carry 60 → 1 h 20 m, so 7:45 + 2:35 = 10:20 pm; in 24‑hour time, 19:45 + 2:35 = 22:20.
Same method in 24‑hour time (you don’t carry past 23:59), and a quick refresher: https://www.mathsisfun.com/time-add-subtract.html
Your result is correct: 7:45 pm + 2 h 35 min = 10:20 pm because 45 + 35 = 80 minutes, so you write 20 and carry 1 hour; in 24‑hour time it’s the same, 19:45 + 2:35 = 22:20 (use mod 24 if you cross midnight).
Want to try one that crosses midnight, e.g., 22:50 + 3:30?
Your 10:20 pm is spot on! Minutes are sneaky little base-60 creatures, not base-100. Add the minutes first: 45 + 35 = 80 minutes, which is 1 hour 20 minutes. So you park the 20 in the minutes slot and “carry” the extra hour. Now for the hours: 7 + 2 + that carried 1 = 10. Ta‑da: 10:20 pm. Your carry game is strong.
In 24-hour time, nothing magical changes-just the same dance with different shoes. Start at 19:45, add 35 minutes to get 20:20 with a carry of 1 hour, then add the hours: 19 + 2 + 1 = 22. That gives 22:20. Only thing to watch for is if you zoom past midnight; then you wrap around 24 (e.g., 23:50 + 0:20 = 00:10 next day). Hope this helps!