Getallenlijn verder met 10 How to make a Montessori "teen" board (Adding n = teen number) >>Take it further by adding 10 to other double digit numbers. Could make multiple sets for centers out of index cards.
FREEBIE: students work with numbers to gain foundations for place value. practice this with real objects like unifix cubes and doing a lot of hands on modeling before giving students these practice sheets.
This activity works on identifying the missing number. The worksheets have the numbers The students fill in the missing number on the eggs. This is a great activity to do in math small groups! *Freebie offered under Scrappin Doodle license