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Unit conversions – practice for Years 3–9

Sample questions on Unit conversions with the right answer and a worked solution, from easy to hard. In the Pickles Academy app a child gets new questions of the same kind every time, so they can't just learn the answers by heart.

Subject
Maths
Year
Years 3–9
Curriculum area
Geometry and measures

Question types: Unit conversions

Rule: Unit conversions

To a bigger unit (cm → m) you divide, to a smaller one (m → cm) you multiply.

Length: 1 km = 1000 m, 1 m = 10 dm = 100 cm, 1 cm = 10 mm.

Mass and capacity: 1 t = 1000 kg, 1 kg = 1000 g, 1 l = 10 dl.

Example: 4 kg 520 g = 4000 g + 520 g = 4520 g

Watch out: An hour has 60 minutes, not 100: 3 h 15 min = 3 × 60 + 15 = 195 min.

Sample questions

  1. Question 1 Easy

    Convert: 2 m = ? cm

    Show the solution
    Answer: 200 cm

    How it works: 1 m = 100 cm, so 2 m = 200 cm

  2. Question 2 Normal

    Convert: 9 cm = ? mm

    Show the solution
    Answer: 90 mm

    How it works: 1 cm = 10 mm, so 9 cm = 90 mm

  3. Question 3 Hard

    Convert: 7000 m = ? km

    Show the solution
    Answer: 7 km

    How it works: 1000 m = 1 km, so 7000 m = 7 km

Related topics

All Maths topics

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