Mission down to 1

Here is your mission

You need a calculator

Enter the number 999 into your calculator

Now, you can use any function (add, subtract, multiply or divide) and any of the numbers:


(but you can only use a number once).

The idea is to reduce 999 down to 1.

Can you get close to the number 1?

What strategies did you use?

Try a few more times...


What if you start with the 9,999 or 999,999

Share  what you have done with your teacher - write about what you found out, take pictures or post a tweet to your School.

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Mission to 999