Answer:
- For 99 + 54, you can round up 99 to 100 and then subtract 1 from the answer. So, 99 + 54 = (100 + 54) - 1 = 154 - 1 = 153.
- For 244 - 99, you can round up 99 to 100 and then add 1 to the answer. So, 244 - 99 = (244 - 100) + 1 = 144 + 1 = 145.
sorry if I m wrong...?