90. You round both numbers up.
Integers include 75, 76, 77, 78 and 79.
75 to 84
80
71 rounds to 70 75 rounds to 80 79 rounds to 80
75,76,77,78,79,81,82,83,84,
90. You round both numbers up.
Integers include 75, 76, 77, 78 and 79.
75 to 84
75 to 84
80
80. The rounding rule states that numbers 5, 6, 7, 8, and 9 get rounded up, so it would get rounded to 80.
77 rounds up to 80.
71 rounds to 70 75 rounds to 80 79 rounds to 80
51 + 29 = 80
Sometimes you round up or round down numbers to get close to the correct answer so that you can make sure that your answer is right. If your answer is not close to the rounding down of the numbers you are using then you need to look it over and do it again.
If the numbers suggest that you should not then it is not better to round.