Place Value Problem Solving – ‘Important Places’

Students are to solve:

How many 3-digit numbers can you make with 4-counters using an abacus? 

Get students to draw and record their solutions in their maths books. See example.

Is there a systematic way this can be achieved? How do you know you have found all of them?

*Adapted from NZ Maths*

https://nzmaths.co.nz/resource/important-places