Checking and securing understanding of written addition and subtraction strategies | Maths

Starter quiz

Complete the statement. The additive ______ of a number is a number that, when added to the original number, gives the sum of zero.
- 'inverse' ✓
Match together each of these subtractions with its equivalent addition.
- 8 - 5
  
  ⇔
  
  8 + (-5) ✓
- 5 - 8
  
  ⇔
  
  5 + (-8) ✓
- 8 - (-5)
  
  ⇔
  
  8 + 5 ✓
- (-5) - 8
  
  ⇔
  
  (-5) + (-8) ✓
Match each calculation to its answer.
- 8 - 5
  
  ⇔
  
  3 ✓
- 5 - 8
  
  ⇔
  
  (-3) ✓
- 8 - (-5)
  
  ⇔
  
  13 ✓
- (-5) - 8
  
  ⇔
  
  (-13) ✓
Work out 12 - (-8)
- -20
- -4
- 4
- 20 ✓
Select the calculations which are equivalent to 15 - 20
- 15 - 15 - 5 ✓
- 15 + (-15) + (-5) ✓
- 15 - (-15) - (-5)
- 15 + (-20) ✓
- 15 + (-15) - (-5)
Lucas has a balance of £2.72 at the school canteen. He spends £5. What is Lucas' new balance?
- -£7.72
- -£2.28 ✓
- -£2.38
- £2.28
- £2.38