23 x 2☐ = 62☐ 835 x 7☐ = 5☐285 4☐2 x ☐55 = 12☐460 
☐0 x 2☐3 = 12☐50 ☐37 x 1☐7 = 11☐119 1☐11 x ☐10 = 31☐310 
Each red box represents a missing digit.
Can you find out what they are?
Topics: Starter  Arithmetic  Problem Solving
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23 x 27 = 621 835 x 71 = 59285 492 x 255 = 125460 
50 x 253 = 12650 637 x 187 = 119119 1511 x 210 = 317310 
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.
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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: 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.