10 Tens and Ones Activities to Teach Place Value Students go around the circle, first count by tens and then switch to ones to get to that number. When it gets to the student who says the number, they have to sit down. (e.g. 43: 10, 20, 30, 40, 41, 42, 43- sit down). And then flip a new card with a new number. Continue playing until everyone is sitting down.