Look at the last digit. If it is a zero, it does not need to be rounded.
4870 does not change.
If it is 1, 2, 3 or 4, it is rounded down, replacing that digit with a zero.
5214 becomes 5210.
If it is 5, 6, 7, 8 or 9, it is rounded up, so the digit becomes zero and the digit beside it is incremented by one.
8176 becomes 8180.
120
To round 8.12 to the nearest ten, we look at the digit in the tens place, which is 0. Since 0 is less than 5, we keep the digit in the tens place the same and change all digits to the right of the tens place to zero. Therefore, rounding 8.12 to the nearest ten gives us 10.
Your question is obviously missing something. I'm pretty sure that you meant to ask what is the greatest 2 digit number that is still a 2 digit number when rounded to the nearest 10. The answer could be 94 or 95, depending upon how you round 95. 95 could be rounded to 90 or to 100, since it is exactly half way between 90 and 100. There is no hard and fast rule regarding how you should round a number ending in 5.
Since the last digit is over 5, than you round up to 730.
9.511 rounded to the nearest whole number is 10. Since the digit after the decimal point (5) is 5 or greater, we round up. Therefore, 9.511 becomes 10 when rounded.
you round up on a number if the last digit is 5 thru 9 you round down if the last digit is 4 thru 1 therefore 31 rounded to the nearest ten is 30
45420
When rounding a number to the nearest whole number, you look at the digit immediately to the right of the decimal point. In this case, the digit is 2. Since 2 is less than 5, you would round down. Therefore, 10.245 rounded to the nearest whole number is 10.
320
Round 12.7 to the nearest whole number would be 13. When rounding a number, you look at the digit immediately to the right of the place value you are rounding to. If that digit is 5 or greater, you round up; if it is less than 5, you round down. In this case, since the digit to the right of the tenths place is 7, which is 5 or greater, you round up to 13.
120
To round 29.56 to the nearest 10, we look at the digit in the tens place, which is 2. Since the digit to the right of it is 9, we round up. Therefore, 29.56 rounded to the nearest 10 is 30.
To round 8.12 to the nearest ten, we look at the digit in the tens place, which is 0. Since 0 is less than 5, we keep the digit in the tens place the same and change all digits to the right of the tens place to zero. Therefore, rounding 8.12 to the nearest ten gives us 10.
Look at the digit in the ones position. That is the 9. A 9 will round the number up, so 89 will round up to 90.
The number 3400 is already rounded to the nearest 10.
To round 1395 to the nearest 10, we look at the digit in the tens place, which is 9. Since 9 is greater than or equal to 5, we round up. Therefore, 1395 rounded to the nearest 10 is 1400.
10