Transum Software

Converting Standard Units

Converting measurements of length, mass, volume and time from one unit of measure to another.

Length Mass Volume Time Mixed Help More Measures

This is level 1; Length. You can earn a trophy if you get at least 9 correct and you do this activity online.

Convert 6m to cm

Correct Wrong

Convert 700cm to m

Correct Wrong

Convert 4cm to mm

Correct Wrong

Convert 500mm to cm

Correct Wrong

Convert 15km to m

Correct Wrong

Convert 9400m to km

Correct Wrong

Convert 2520m to km

Correct Wrong

Convert 5.9cm to mm

Correct Wrong

Convert 4.95cm to mm

Correct Wrong

Convert 5980mm to m

Correct Wrong

Convert 7.3m to mm

Correct Wrong

Convert 9.02km to mm

Correct Wrong


This is Converting Standard Units level 1. You can also try:
Level 2 Level 3 Level 4 Level 5


Try your best to answer the questions above. Type your answers into the boxes provided leaving no spaces. As you work through the exercise regularly click the "check" button. If you have any wrong answers, do your best to do corrections but if there is anything you don't understand, please ask your teacher for help.

When you have got all of the questions correct you may want to print out this page and paste it into your exercise book. If you keep your work in an ePortfolio you could take a screen shot of your answers and paste that into your Maths file.

This web site contains over a thousand free mathematical activities for teachers and pupils. Click here to go to the main page which links to all of the resources available.

Please contact me if you have any suggestions or questions.

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Mathematicians are not the people who find Maths easy; they are the people who enjoy how mystifying, puzzling and hard it is. Are you a mathematician?

Comment recorded on the 9 April 'Starter of the Day' page by Jan, South Canterbury:

"Thank you for sharing such a great resource. I was about to try and get together a bank of starters but time is always required elsewhere, so thank you."

Comment recorded on the 28 September 'Starter of the Day' page by Malcolm P, Dorset:

"A set of real life savers!!
Keep it up and thank you!"

Featured Activity

Hi-Low Predict

Hi-Low Predict

A version of the Play Your Cards Right TV programme. Calculate the probabilities of cards being higher or lower than the one shown. a fun way to practise applying probability and using fractions.


There are answers to this exercise but they are available in this space to teachers, tutors and parents who have logged in to their Transum subscription on this computer.

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Subscribers can manage class lists, lesson plans and assessment data in the Class Admin application and have access to reports of the Transum Trophies earned by class members.

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Go Maths

Learning and understanding Mathematics, at every level, requires learner engagement. Mathematics is not a spectator sport. Sometimes traditional teaching fails to actively involve students. One way to address the problem is through the use of interactive activities and this web site provides many of those. The Go Maths page is an alphabetical list of free activities designed for students in Secondary/High school.

Maths Map

Are you looking for something specific? An exercise to supplement the topic you are studying at school at the moment perhaps. Navigate using our Maths Map to find exercises, puzzles and Maths lesson starters grouped by topic.


If you found this activity useful don't forget to record it in your scheme of work or learning management system. The short URL, ready to be copied and pasted, is as follows:

Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for those learning Mathematics anywhere in the world. Click here to enter your comments.


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Common Units


kilometre (km)1 km = 1000 m
metre (m) 
centimetre (cm)100 cm = 1 m
millimetre (mm)1000 mm = 1 m
Don't wait until you have finished the exercise before you click on the 'Check' button. Click it often as you work through the questions to see if you are answering them correctly.