Sadly, over half term my calculator broke! Only some of the keys are now working!
Your challenge is to make the totals from numbers 1 - 20 only using the working keys. Number 5 has been done for you.
Were odd or even numbers easier?
Record your methods mathematically - remember to use brackets if you need them!
Try to make each total using the smallest number of key presses each time.
Below is the link to an online version of this puzzle. There are six broken calculators to have a go at. This is the level two challenge, can you crack the level six broken calculator challenge ??????