Starter quiz

  • 140 - 60 = 80. Which number is the minuend in this equation?
    • 140  ✓
    • 60
    • 80
  • 140 - 60 = 80. 60 in this equation is the ______.
    • minuend
    • subtrahend  ✓
    • difference
  • Which is the best way to partition the subtrahend in this equation? 150 - 70 = 80
    • Partition 70 into 10 and 60
    • Partition 70 into 30 and 40
    • Partition 70 into 50 and 20  ✓
  • What number is missing from this calculation? 120 − 70 = 120 − 20 − ______.
    • '50' ✓
  • Which partitioned subtrahend will help you to bridge 100?
    • 150 - 90
      ⇔
      90 = 50 + 40 ✓
    • 180 - 90
      ⇔
      90 = 80 + 10 ✓
    • 140 - 50
      ⇔
      50 = 40 + 10 ✓
    • 120 - 50
      ⇔
      50 = 20 + 30 ✓
  • Match the missing subtrahends.
    • 150 − _ = 90
      ⇔
      60 ✓
    • 140 − _ = 90
      ⇔
      50 ✓
    • 130 − _ = 90
      ⇔
      40 ✓
    • 120 − _ = 90
      ⇔
      30 ✓
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