Why do this
would fit in well when children are doing addition
and subtraction of numbers under $20$. It would help them to see
that these are not all "sums" but have some real-life
How many dog biscuits are there altogether?
Do those two numbers add to $16$?
Learners could find how many biscuits each dog would have if there
were $10$, $11$, $12$ ... $20$ altogether.
Using $16$ counters will help children work on the problem.