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

Starter quiz

Which numbers are multiples of 1?
- 7 ✓
- 4.4
- 3.93
- 20 ✓
What is the missing number in the sequence?
- '4.2' ✓
Match the number to the correct letter on the number line.
- 2.4
  
  ⇔
  
  A ✓
- 4.2
  
  ⇔
  
  B ✓
- 7.4
  
  ⇔
  
  C ✓
- 7.9
  
  ⇔
  
  D ✓
What are the closest multiples of one that 6.38 sits between?
- 5 and 7
- 6 and 7 ✓
- 6.3 and 6.4
- 6.3 and 7
What is 9.97 rounded to the nearest multiple of 0.1?
- '10' ✓
What is 9.9 rounded to the nearest multiple of 1?
- '10' ✓

What are the closest multiples of one that 3.29 sits between?
- 2 and 3
- 3 and 4 ✓
- 3.2 and 3.3
- 3.9 and 4
Tick the statements that are correct about the number 4.56
- It is between 4 and 5 ✓
- The nearest multiple of one is 4
- It is 44 hundredths away from 5 ✓
- It is 56 hundredths away from 4 ✓
What is 6.50 rounded to the nearest multiple of 1?
- '7' ✓
Tick the numbers that would round to the previous multiple of one, in this case 8.
- 8.01 ✓
- 8.38 ✓
- 8.09 ✓
- 8.90
- 8.5
A bag of sweets weighs 45.41 g. How much does the bag weigh to the nearest gram? ______ g
- '45' ✓
Sam eats 5 sweets from a bag. The bag now weighs 32.51 g. How much does the bag weigh to the nearest gram? ______ g
- '33' ✓

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Identify the next and previous whole numbers to the number being rounded.
Identify which whole number is nearest to the number being rounded.
If the value of the tenths is 5 or greater then round up to the next whole number.
If the value of the tenths is less than 5, ignore the tenths and round down to the whole number.
To round a number with hundredths to the nearest whole number, you only need to look at the tenths.

Pupils may mistake the previous multiple of one for example: previous multiple of 6.38 being 5.

Ensure pupils are given plenty of opportunities to place numbers on number lines, identifying the previous and next multiples of one.

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.