What's Before Beryl?
Saying the number before any number up to 6, then 10
Dig for Acorns
Subtracting 1 from any number from 2 to 6, and then from 2 to 10, by saying the number which comes before
Adding and subtracting 10 using a 1-100 grid
Easy Come, Easy Go
Adding and subtracting 10 using coins