Round a decimal number with hundredths to the nearest tenth | Maths

Starter quiz

What is the missing number in the sequence?

'2.34' ✓
A is between which multiples of 1?

9 and 10 ✓

9 and 11

8 and 10
What is the previous multiple of one?

'6 ' ✓
A number is between 2 and 3. It has less than 4 tenths. What numbers could it be?

1.3

2.4

2.3 ✓

2.2 ✓
What is 7.4 rounded to the nearest multiple of one?

'7 ' ✓
Match each number with the multiple of one it would be rounded to.

1.4

⇔

1 ✓

2.7

⇔

3 ✓

3.5

⇔

4 ✓

8.1

⇔

8 ✓

8.9

⇔

9 ✓

Tick the multiples of one tenth.

0.8 ✓

3.6 ✓

12.9 ✓

4 ✓

2.74
What are the nearest multiples of 0.1 that 12.45 sits between?

12 and 13

12.4 and 12.5 ✓

12.44 and 12.46
What is the next multiple of one tenth?

'8 ' ✓
8.26 sits between the multiples of 0.1 8.2 and {{__}}

'8.3 ' ✓
What is 6.53 rounded to the nearest multiple of 0.1?

'6.5 ' ✓
What is 46.03 rounded to the nearest multiple of 0.1?

'46 ' ✓

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Identify the next and previous tenths to the number being rounded
Identify which tenth is nearest to the number being rounded
If the value of the hundredths is 5 or greater then round up to the next tenth
If the value of the hundredths is less than 5, ignore the hundredths and round down to the previous tenth

When recording which multiple of 0.1 a number is nearest to, pupils may forget to include the ones.

Make sure pupils have plenty of opportunities to continue counting and rounding with multiples of 0.1 beyond one whole.

Multiple - A multiple is the result of multiplying a number by an integer. For example 2 × 5 = 10 so 10 is a multiple of 2 and 5.
Previous - Something that comes before something else is known as the previous thing.
Next - Something that comes after something else is known as the next thing.
Rounding - Rounding means making a number simpler but keeping its value close to what it was.