21 x 2☐ = 50☐ 705 x 1☐ = 9☐65 5☐7 x ☐49 = 85☐73 
☐7 x 4☐3 = 12☐71 ☐35 x 2☐2 = 77☐20 1☐47 x ☐81 = 59☐807 
Each red box represents a missing digit.
Can you find out what they are?
Topics: Starter  Arithmetic  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 1 December  Next Day
21 x 24 = 504 705 x 13 = 9165 577 x 149 = 85973 
27 x 473 = 12771 335 x 232 = 77720 1247 x 481 = 599807 
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.
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=December1 However it would be better to assign one of the student interactive activities below. 

The 1st December is the date to start opening the doors of the 2024 Mathematics Advent Calendar.