nora has 1,555 on her computer .She rounds this number to the nearest ten ,to the nearest hundred,and to the nearest thousand . she gets three different rounded numbers. What are the numbers? why are there three different answers?

1560

1600
2000

To round the number 1,555 to the nearest ten, we look at the digit in the ones place, which is 5. Since 5 is greater than or equal to 5, we round up. Therefore, rounding 1,555 to the nearest ten gives us 1,560.

To round the number 1,555 to the nearest hundred, we look at the digit in the tens place, which is 5. Again, since 5 is greater than or equal to 5, we round up. Therefore, rounding 1,555 to the nearest hundred gives us 1,600.

To round the number 1,555 to the nearest thousand, we look at the digit in the hundreds place, which is 1. Since 1 is less than 5, we round down. Therefore, rounding 1,555 to the nearest thousand gives us 1,000.

The three different rounded numbers are:
1) Rounded to the nearest ten: 1,560
2) Rounded to the nearest hundred: 1,600
3) Rounded to the nearest thousand: 1,000

There are three different answers because rounding a number depends on the criteria used. When rounding to the nearest ten, we look at the ones place. When rounding to the nearest hundred, we look at the tens place. And when rounding to the nearest thousand, we look at the hundreds place. Each place value has different criteria, which leads to different rounded numbers for the same original number.

To round the number 1,555 to the nearest ten, hundred, and thousand, here's how you can do it:

1. Nearest Ten:
To round to the nearest ten, you look at the digit in the ones place (which is 5 in this case). If the ones digit is 5 or greater, you round up to the next ten. If the ones digit is less than 5, you round down to the previous ten.

In this case, the digit in the ones place is 5, so you would round up to the next ten. Thus, rounding 1,555 to the nearest ten gives us 1,560.

2. Nearest Hundred:
To round to the nearest hundred, you look at the digit in the tens place (which is 5 in this case). If the tens digit is 5 or greater, you round up to the next hundred. If the tens digit is less than 5, you round down to the previous hundred.

In this case, the digit in the tens place is 5, so you would round up to the next hundred. Thus, rounding 1,555 to the nearest hundred gives us 1,600.

3. Nearest Thousand:
To round to the nearest thousand, you look at the digit in the hundreds place (which is 1 in this case). If the hundreds digit is 5 or greater, you round up to the next thousand. If the hundreds digit is less than 5, you round down to the previous thousand.

In this case, the digit in the hundreds place is 1, so you would round down to the previous thousand. Thus, rounding 1,555 to the nearest thousand gives us 1,000.

So, the three different rounded numbers for 1,555 are:
- Nearest Ten: 1,560
- Nearest Hundred: 1,600
- Nearest Thousand: 1,000

The reason there are three different answers is that rounding depends on the place value you are rounding to. When rounding to different place values, the rules for rounding can vary. In this case, the rounding rules for tens, hundreds, and thousands are different, resulting in three different rounded numbers.