Use the divisibility rules to find multiples of 3 | Maths

Starter quiz

What single number fits into this gap to make this correct? 15 ÷ 3 = ___
- 5 ✓
- 4
- 3
Order the multiples of 3 from the highest to lowest.
- 1
  
  ⇔
  
  36
- 2
  
  ⇔
  
  30
- 3
  
  ⇔
  
  27
- 4
  
  ⇔
  
  21
- 5
  
  ⇔
  
  18
Identify the multiples of 3
- 6 ✓
- 8
- 9 ✓
- 14
- 15 ✓
Match the expressions to the products.
- 3 × 6
  
  ⇔
  
  18 ✓
- 3 × 7
  
  ⇔
  
  21 ✓
- 3 × 9
  
  ⇔
  
  27 ✓
- 3 × 5
  
  ⇔
  
  15 ✓
- 3 × 8
  
  ⇔
  
  24 ✓
Andeep has 36 guinea cards and shares them between 3 friends. How many cards does each friend get?
- '12 ' ✓
A bakery has baked 270 cupcakes. They are packed into boxes of 3 Which calculations will help to solve this problem?
- 27 tens ÷ 3 ✓
- 3 × 9 tens ✓
- 90 + 90 − 90
- 270 − 3

Select the multiples of 3
- 36 ✓
- 39 ✓
- 42 ✓
- 46
- 49
What is the digit sum for 249?
- '15' ✓
Match the numbers to their digit sum.
- 421
  
  ⇔
  
  7 ✓
- 2,306
  
  ⇔
  
  11 ✓
- 876
  
  ⇔
  
  21 ✓
- 3,511
  
  ⇔
  
  10 ✓
Is 3,021 a multiple of 3?
- Yes ✓
- No
Is 6,413 a multiple of 3?
- Yes
- No ✓
Is 432 a multiple of 3?
- Yes ✓
- No

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Numbers that can be divided by 3 and leave no remainder are divisible by 3
To find the digit sum of a number, add the digits in the number together so the digit sum of 17 is 1 + 7 which equals 8
For a number to be divisible by three, the dgit sum of the number must be a divisible by 3

Lack of understanding of key terms such as: 'digit,' 'number.'

Explain clearly the difference between the two key terms and encourage children to test the divisibility rule on both 3 digit and 4 digit numbers.

Digit sum - The sum of the digits of a number is called its digit sum.
Divisible / divisibility - Divisibility is when division of a number results in another whole number. A number is divisible by another if it can be shared exactly with no remainder.
Multiple - A multiple is the result of multiplying a number by another whole number.