You may use only these keys.
1 2 3 4 5 6 7 8 9 + =
Take turns to add a single-digit number to what is already on the calculator.
The winner is the player who makes the display show 30.
If you go over 30 you lose.
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 the target was 53 instead of 30 what strategy could you use to win?
Investigate for other targets and different available calculator keys.
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Teacher, do your students have access to computers such as tablets, iPads or Laptops? This page was really designed for projection on a whiteboard but if you really want the students to have access to it here is a concise URL for a version of this page without the comments:
However it would be better to assign one of the student interactive activities below.
Here is the URL which will take them to Multi-pile Nim which is a different game but based on similar principles.
You might also like to try Simple Nim with pens and pencils.