**Rounding to 1 decimal place** *KS2 Revision*

## What you need to know

**Things to remember:**

- When rounding to 1 decimal place we look at the hundredths to see how to round.
- If the hundredths are 4 or less, the tenths stay the same and the hundredths become 0.
- If the hundredths are 5 or more, the tenths go up by 1 and the hundredths become 0.

Let’s remind ourselves how we round to the nearest 10.

We find the tens and then look to the right.

If the units are 4 or less, the tens stay the same and the units become 0.

If the units are 5 or more, then tens go up by 1 and the units become 0.

Number Rounded

22 20

31 30

65 70

38 49

So, let’s look at how we round to 1 decimal place.

Round 2.36 to 1 decimal place.

We do this using the same step as we have done previously.

**Step 1: **Find first decimal place (the tenths).

2.**3**6

**Step 2: **Look at the number to the right (the hundredths)

2.**3**__6__

__ __

**Step 3: **Round the tenths.

We have a 6, so the 3 is going to increase by 1 to make 4.

2.**4**__0__

**Step 4: **Remove the 0

2.4

So, 2.36 rounded to 1 decimal place is 2.4.

We do the same when the hundredths are less than 5, but the units tenths don’t change.

## Example Questions

**Question 1:** Round 5.89 to 1 decimal place.

**Step 1: **Find first decimal place (the tenths).

5.**8**9

**Step 2: **Look at the number to the right (the hundredths)

5.**8**__9__

**Step 3: **Round the tenths.

We have a 9, so the 8 is going to increase by 1 to make 9.

5.**9**__0__

**Step 4: **Remove the 0

5.9

So, 5.89 rounded to 1 decimal place is 5.9.

**Question 2:** Round 6.23 to 1 decimal place.

**Step 1: **Find first decimal place (the tenths).

6.**2**3

**Step 2: **Look at the number to the right (the hundredths)

6.**2**__3__

**Step 3: **Round the tenths.

We have a 3, so the 2 is going to stay the same.

6.**2**__0__

**Step 4: **Remove the 0

6.2

So, 6.23 rounded to 1 decimal place is 6.2.