Starter quiz

  • Using the Gattegno chart or otherwise, work out which of the following calculations equate to 48.
    Using the Gattegno chart or otherwise, work out which of the following calculations equate to 48.
    • 6\times8  ✓
    • 0.04\times1200  ✓
    • 0.6\times800
    • 60\times0.8  ✓
    • 400\times1.2
  • Using the Gattegno chart or otherwise, match each calculation to its correct answer.
    Using the Gattegno chart or otherwise, match each calculation to its correct answer.
    • 2 × 4 = 0.2 × 40 = 0.4 × 20
      ⇔
      8 ✓
    • 6 × 2 = 0.6 × 20 = 0.2 × 60
      ⇔
      12 ✓
    • 0.7 × 30 = 0.3 × 70 = 7 × 3
      ⇔
      21 ✓
    • 0.3 × 30 = 3 × 3 = 0.003 × 3000
      ⇔
      9 ✓
  • Using the associative law to partition 5000 and 7000 into powers of 10, find the calculations that are equivalent to 7000 × 5000.
    • 3.5\times 10^6
    • 35\times 10^7
    • 7\times1000\times5\times1000  ✓
    • 35\times 10^6  ✓
    • 3.5\times 10^7  ✓
  • Which of the following calculations are equivalent to 3000\times2000?
    • 3\times2\times 1000\times 1000  ✓
    • 6\times 10^6  ✓
    • 3\times2\times 100\times 100
    • 3\times2\times 10000\times 1000
    • 3\times10000\times2\times1000
  • Without using a calculator, work out 0.007 × 30.
    • '0.21' ✓
  • Which of the following calculations are equivalent to 4.5\times0.05?
    • \frac{45\times5}{10^2}
    • \frac{45\times5}{1000}  ✓
    • \frac{45\times5}{10000}
    • \frac{45\times5}{10^3}  ✓
    • \frac{225}{10^5}  ✓
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