Which of the numbers from one to twenty can you make with the digits:
4, 5, 6 and 7
You can use any mathematical operations but you must use all four digits once in each calculation.
Example 20 = 4(7  6) x 5
Topics: Starter  Arithmetic  Mental Methods  Problem Solving
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.
Click here to enter your comments.
Previous Day  This starter is for 15 April  Next Day
4, 5, 6 and 7
1 = 
11 = 
There are many different answers. These are not the only ones
1 = (7  6)(5  4) 
11 = 75  64 
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 create another version of this Starter.
Your access to the majority of the Transum resources continues to be free but you can help support the continued growth of the website by doing your Amazon shopping using the links on this page. Below is an Amazon link. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.
Educational Technology on Amazon
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: Transum.org/go/?Start=April15 However it would be better to assign one of the student interactive activities below. 

Here is the URL which will take them to a different type of mental maths activity.
Here is the URL which will take them to a similar 4 digit calculation challenge.