Place value when multiplying and dividing by 10

Practice place value

https://ca.ixl.com/math/grade-4/convert-between-place-values

https://ca.ixl.com/math/grade-4/addition-patterns-over-increasing-place-values

https://www.mathgames.com/skill/4.28-addition-patterns-over-increasing-place-values

The Mr. Z Method- Elapsed time

Elapsed Time Using T-Charts