Calculating with measurements · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Calculating with measurements

Mathematics · Measurement · ages 7-8
Name ______________________   Date ____________

  1. A strip starts at 0 mm. Its other end is at a missing ruler label between 11 mm and 13 mm. Each mark adds 1 mm. What is the strip's length in millimetres?

    Answer: ______________

  2. You want to measure a pencil with a ruler. Where should you line up the pencil's starting end?

    • At the 1 cm mark
    • At the ruler's edge
    • At the zero mark
    • At the 10 cm mark

  3. A ribbon starts at 0 cm on a ruler with steps of 1 cm. Its other end is at the missing label between 6 cm and 8 cm. How long is the ribbon?

    • 5 cm
    • 7 cm
    • 9 cm

  4. What is 250 ml + 400 ml?

    Cup A250Cup B400
    • 550 ml
    • 650 ml
    • 750 ml

  5. A large jug contains 1 litre of water. You add 200 ml. How many millilitres does it contain now?

    Answer: ______________

  6. A jug needs 1000 ml to be full. It already has 650 ml. How many more millilitres are needed?

    Answer: ______________

  7. One bag of apples has a mass of 2 kg. Another has a mass of 1500 g. Which bag is heavier?

    • The 2 kg bag
    • The 1500 g bag
    • Both bags match
    • Units cannot match

  8. Sam has 200 g of flour and a ribbon 30 cm long. He adds 200 + 30 and says their total mass is 230 g. These measurements give enough information to find that mass.

    Circle one:   True   False

  9. A stick is 6 cm 4 mm long. Mia adds 6 + 4 and records 10 mm. What length should she record in millimetres?

    • 10 mm
    • 604 mm
    • 64 mm

  10. A bottle contains 1 litre of juice. You pour out 240 ml. How many millilitres remain?

    Answer: ______________

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Answer key

For grown-ups. Fold this page away before handing over the rest.

Calculating with measurements W1-mt_6oxQPNLHNv-s1

  1. 12 · The label between 11 and 13 in steps of 1 is 12. Starting at zero gives a length of 12 mm.
  2. At the zero mark · Line up the starting end with zero. Then read the mark at the other end.
  3. 7 cm · The missing label between 6 and 8 in steps of 1 is 7. The ribbon starts at zero, so its length is 7 cm.
  4. 650 ml · Add the numbers: 250 + 400 = 650, so the total is 650 ml.
  5. 1200 · 1 litre is 1000 ml. Adding 200 ml gives 1200 ml.
  6. 350 · 1000 − 650 = 350, so 350 more millilitres are needed.
  7. The 2 kg bag · 2 kg is 2000 g. Since 2000 g is more than 1500 g, the 2 kg bag is heavier.
  8. False · The ribbon's length is not its mass. Its mass is needed before the two masses can be added.
  9. 64 mm · Change 6 cm to 60 mm before adding 4 mm. The stick is 64 mm long.
  10. 760 · 1 litre is 1000 ml. Subtract 240 ml: 1000 - 240 = 760 ml.
Worksheet · LightMySky