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5-a-day: Monday, November 2

Grades 7 and 8 (Years 8 and 9 in England)

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Date

Score/ 5

  1. Question 1

    Elena sells solar panels and earns 5% commission on sales. This month Elena sold $3900 worth. How much commission is that? (Type the number only.)

    Answer

  2. Question 2

    2 × □ = −2. What number goes in the box?

    Answer

  3. Question 3

    Find the distance between (3, 3) and (−1, 0), to 1 decimal place.

    xy−12−6612−12−66120AB

    Answer

  4. Question 4

    Convert 18 km/h into metres per second.

    Answer

  5. Question 5

    A hiking map has scale 1 : 25 000. A trail measures 12 cm on the map. How long is the trail, in km?

    Answer

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Answer key: 5-a-day: Monday, November 2

  1. 1. 195

    • 1% = 39
    • 5% = 195

  2. 2. -1

    • −2 ÷ 2 = −1

  3. 3. 5

    • Δx = −4, Δy = −3
    • √(16 + 9) = √25 ≈ 5

  4. 4. 5

    • 18 km/h = 18000 m ÷ 3600 s
    • = 5 m/s

  5. 5. 3

    • 12 × 25 000 = 300 000 cm
    • 300 000 ÷ 100 000 = 3 km