Starter quiz

  • Which number represents the subtrahend in this equation? 31 − 10 = 21
    • 31
    • 21
    • 10  ✓
  • What is the difference between 19 and 21?
    • '2' ✓
  • What is 100 − 30 = ______
    • '70' ✓
  • What is 200 − 50 = ______
    • '150' ✓
  • Calculate the missing number is this equation: 40 + ___ = 220
    • 160
    • 170
    • 180  ✓
    • 200
  • Which pairs of numbers have a sum of 600?
    • 100 and 400
    • 200 and 500
    • 300 and 300  ✓
    • 200 and 400  ✓
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