Round Numbers within 100,000

Children build on their learning to round any number within 100,000 to the nearest 10, 100, 1,000 or 10,000.

They should be confident with multiples of 10,000 and the process of rounding should also be familiar.

Children need to realise that the midpoint of two multiples of

10,000 ends in 5,000, so they need to look at the digit in the

thousands column to determine how to round the number.

Be careful with the language of “round up” and “round down” in case children mistakenly change the wrong digits when rounding.

The previous multiple of 10,000 is ____

The next multiple of 10,000 is ____

Ask,

“Which multiples of 10,000 does the number lie between?”

“Which place value column should you look at to round the

number to the nearest 10, 100, 1,000, 10,000?”

“What happens if a number lies exactly halfway between two

multiples of 10,000?”