Four minutes No calculator

Without a calculator multiply each of these numbers by 1001:

5 88 487 228
687 207 899 568
2332 1842 4944 3967

Now look back at your working. Can you find a quick way of doing these calculations in your head? Try this exercise again with different numbers.

A Mathematics Lesson Starter Of The Day


Topics: Starter | Arithmetic | Mental Methods | Place Value

  • Transum,
  • This is just the sort of quick activity we should squeeze into our lessons more often. It is a classic arithmetic task that leads to pupils thinking about place value and how it might help them with their mental calculating abilities. This activity won't take long and is ideal for taking advantage of the time just before the main part of the lesson starts. Did it work well for your class?

How did you use this starter? Can you suggest how teachers could present or develop this resource? Do you have any comments? It is always useful to receive feedback and helps make this free resource even more useful for Maths teachers anywhere in the world.
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If you don't have the time to provide feedback we'd really appreciate it if you could give this page a score! We are constantly improving and adding to these starters so it would be really helpful to know which ones are most useful. Simply click on a button below:

Excellent, I would like to see more like this
Good, achieved the results I required
Didn't really capture the interest of the students
Not for me! I wouldn't use this type of activity.

This starter has scored a mean of 3.2 out of 5 based on 171 votes.

Previous Day | This starter is for 8 June | Next Day



5005 88088 487487 228228
687687 207207 899899 568568
2334332 1843842 4948944 3970967

Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.

Casio Classwiz Calculator

There is currently a lot of talk about this new calculator being the best in its price range for use in the Maths classroom. The new ClassWiz features a high-resolution display making it easier to view numerical formulas and symbols but it isn't a graphical calculator as such (it has the capacity to draw graphs on your smart phone or tablet, via a scannable QR code and an app).

As well as basic spreadsheet mode and an equation solving feature you also get the ability to solve quadratic, cubic or quartic polynomial inequalities and the answer is given just as it should be written down, using the correct inequality symbols!

This calculator has a high-performance processor and twice the memory of previous models ensuring speedy operation and superior computational power.more...

Online Maths Shop

Laptops In Lessons

Teacher, do your students have access to computers?
Do they have iPads or Laptops in Lessons?

Whether your students each have a TabletPC, a Surface or a Mac, this activity lends itself to eLearning (Engaged Learning).

Laptops In Lessons

Here a concise URL for a version of this page without the comments.


Here is the URL which will take them to a related student activity.





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