Each red box represents a missing operation (plus, minus, times or divide).
Can you work out what they are?
(26 ❑ 27) ❑ 21 = 74 30 ❑ (26 ❑ 32) = 802 (27 ❑ 38) ❑ 29 = 18 (27 ❑ 34) ❑ (22 ❑ 28) = 623 
Topics: Starter  Arithmetic
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 9 December  Next Day
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.
There is a printable worksheet to go with this activity.
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 search box and some items I have chosen and recommend to get you started. As an Amazon Associate I earn a small amount from qualifying purchases which helps pay for the upkeep of this website.
GCSE Revision and PracticeWhatever exam board you use for GCSE Mathematics, this book by David Rayner remains an allround winner. With this latest edition presented in full colour and completely updated for the new GCSE(91) specifications, this uniquely effective text continues to increase your chance of obtaining a good grade. This book is targeted at the Higher tier GCSE, and provides a wealth of practice with careful progression, alongside substantial revision support for the newstyle grading and exam questions. With all the new topics included, and a dedicated section on using and applying mathematics, this unique resource can be used either as a course book over two or three years or as a revision text in the runup to exams. more... 
Teacher, do your students have
access to computers? 

Here a concise URL for a version of this page without the comments.
Transum.org/go/?Start=December9
Here is the URL which will take them to a related student activity.
BIDMAS is an acronym reminding students of the order of operation used when evaluating expressions involving a number of different operations. The letters of BIDMAS stand for:
When only addition and subtraction (or only multiplication and division) are left in an expression work them out in the order you find them, starting from the left and working towards the right.