Converting units with decimal notation · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Writing conversions as decimals

Mathematics · Measurement · ages 10-11
Name ______________________   Date ____________

  1. 1 km = 1,000 m. What is 0.8 km in meters?

    • 80 m
    • 800 m
    • 8,000 m

  2. 1,000 g = 1 kg. What is 4,750 g written in kilograms?

    • 4.75 kg
    • 47.5 kg
    • 0.475 kg

  3. 1 m is the same as 1,000 mm.

    Circle one:   True   False

  4. A hiking trail is 0.6 km long. How many meters is that?

    02004006008001000
    • 6 m
    • 60 m
    • 600 m

  5. A bag of rice weighs 2,450 g. Write its mass in kilograms as a decimal (example: 1.5).

    Answer: ______________

  6. Which unit is 100 times bigger than a centimeter?

    • Millimeter
    • Meter
    • Kilometer

  7. A ribbon is 2.5 m long. Ken cuts off 350 mm. How many meters of ribbon are left? Give your answer as a decimal.

    Answer: ______________

  8. Zara converts 4,500 g to kilograms and writes 45 kg. What mistake did she make?

    • She divided by 100 instead of 1,000
    • She multiplied instead of dividing
    • She used the wrong unit name
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Answer key

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

Writing conversions as decimals W1-mt_2VpdPjvewx-s1

  1. 800 m · 0.8 times 1,000 is 800, so 0.8 km is 800 m.
  2. 4.75 kg · 4,750 divided by 1,000 is 4.75, so 4,750 g is 4.75 kg.
  3. True · A millimeter is 1,000 times smaller than a meter, so 1,000 mm = 1 m.
  4. 600 m · Multiply 0.6 by 1,000: 0.6 km = 600 m.
  5. 2.45 · 2,450 divided by 1,000 is 2.45, so the bag weighs 2.45 kg.
  6. Meter · 100 cm makes 1 m, so a meter is 100 times bigger than a centimeter.
  7. 2.15 · 350 mm = 0.35 m (divide by 1,000). Then 2.5 m minus 0.35 m leaves 2.15 m of ribbon.
  8. She divided by 100 instead of 1,000 · Dividing by 1,000 gives 4.5 kg. Dividing by 100 instead gives the wrong answer, 45.
Worksheet · LightMySky