Starter quiz

  • When subtracting fractions you must have ______.
    • a common numerator
    • a common denominator  ✓
    • the largest fraction first
  • Which of the following are not common denominators of {1}\over{4} and {7}\over{20}?
    • 4  ✓
    • 20
    • 24  ✓
    • 40
  • Which symbol is missing here? \frac{2}{9} + \frac{1}{8} \square \frac{2}{9} + \frac{1}{7}.
    • <  ✓
    • >
    • =
    • ?
  • Calculate {7}\over{12} - {1}\over{3}.
    • {4}\over{9}
    • {3}\over{12}  ✓
    • {4}\over{12}
    • {8}\over{15}
  • Which of the following is not a correct alternative for {3}\over{8} - {3}\over{4} + {7}\over{16}?
    • {3}\over{8} + {7}\over{16} - {3}\over{4}
    • {3}\over{8} + {7}\over{16} + \left(-\frac34\right)
    • {3}\over{8} - \left(\frac{3}{4} + \frac{7}{16}\right)  ✓
  • Calculate {3}\over{8} - {3}\over{4} + {7}\over{16}.
    • \left(-\frac4{16}\right)
    • {7}\over{4}
    • {7}\over{12}
    • {1}\over{16}  ✓
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