Starter quiz

  • Which equations are represented by this bar model?
    Which equations are represented by this bar model?
    • 12 + x = 21  ✓
    • 21 + x = 12
    • 21 − 12 = x  ✓
    • 21 + 12 = x
    • 12 = 21 − x  ✓
  • Which equations are represented by this bar model?
    Which equations are represented by this bar model?
    • a + 8 = 33
    • 33 − 8 = a
    • a = 8 + 33  ✓
    • 33 = a − 8  ✓
    • 8 = 33 − a
  • Match each value with its additive inverse.
    • 3
      ⇔
      −3 ✓
    • -3
      ⇔
      3 ✓
    • 1\over 3
      ⇔
      −{1\over 3} ✓
    • −{1\over 3}
      ⇔
      1\over 3 ✓
    • 0.3
      ⇔
      −0.3 ✓
    • 10\over 3
      ⇔
      −{10\over 3} ✓
  • Which of these are zero pairs?
    • 5 and (−5)  ✓
    • (−3) and (−3)
    • 1 and (−0.1)
    • 1\over 2 and 2
    • 2\over 5 and (−0.4)  ✓
  • What is the value of the expression 2(3x + 5) when x = −3 ?
    • '−8' ✓
  • The diagram shows a balanced scale on the left. When an operation is performed to the RHS, it is not balanced. What operation must be performed to the LHS to maintain equality?
    The diagram shows a balanced scale on the left. When an operation is performed to the RHS, it is not balanced. What operation must be performed to the LHS to maintain equality?
    • \times 2
    • \times 3
    • +9  ✓
    • + 12
    • + 18
+