The problem asks to identify which of the numbers 84, 87, 72, 76, and 90 round to 80 when rounded to the nearest 10.
2025/4/4
1. Problem Description
The problem asks to identify which of the numbers 84, 87, 72, 76, and 90 round to 80 when rounded to the nearest
1
0.
2. Solution Steps
To round a number to the nearest 10, we look at the digit in the ones place. If the digit is 5 or greater, we round up to the next multiple of
1
0. If the digit is less than 5, we round down to the previous multiple of
1
0. - 84: The digit in the ones place is 4, which is less than
5. So, 84 rounds down to
8
0. - 87: The digit in the ones place is 7, which is greater than or equal to
5. So, 87 rounds up to
9
0. - 72: The digit in the ones place is 2, which is less than
5. So, 72 rounds down to
7
0. - 76: The digit in the ones place is 6, which is greater than or equal to
5. So, 76 rounds up to
8
0. - 90: The digit in the ones place is 0, so 90 rounds to
9
0.
The numbers that round to 80 are 84 and
7
6.
3. Final Answer
84 and 76.