How do you round numbers ks3?

To round a number to a given number of decimal places, look at the number in the next decimal place:

1. If it’s less than , round down.
2. If it’s or more, round up.

How do you do rounding in math?

Here’s the general rule for rounding:

1. If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up. Example: 38 rounded to the nearest ten is 40.
2. If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down. Example: 33 rounded to the nearest ten is 30.

How do you round to the nearest whole number BBC Bitesize?

Rounding money or decimals The closest whole number to 2.8 is 3. If the price is £2.08 you can round down to £2 because the number in the tenths position is 0. The closest whole number to 2.08 is 2. Don’t forget, if the number you are rounding is 5, round up.

How do you know when to round up or down a decimal?

Rounding is a process to estimate a particular number in a context. To round a number look at the next digit in the right place, if the digit is less than 5, round down and if the digit is 5 or more than 5, round up.

What place do you round to?

To round a decimal number to the nearest ten thousandth, look at the digit one place to the right of the fourth place (look at the 5th place), if the digit there is 5 or greater, you round up to the nearest ten thousand; and if the digit in the 5th place is less than 5, you round down to the nearest ten thousand or you …

What is the 5 rounding rule?

In rounding off numbers, if the first figure dropped is 5, and all the figures following the five are zero or if there are no figures after the 5, then the last figure kept should be increased by 1 if that last figure is odd. For example, if only two decimals are to be kept, then 6.755000 becomes 6.76.

How do you introduce rounding to students?

The best way to start is by modeling rounding using two-digit numbers and showing children how to round to the nearest ten. Working with your child, ask him or her to think of a number being rounded, and ask what comes before and after that number, and fill in only those two numbers.