Relating addition and subtraction and playing the game BUMP; counting down. Relating addition and subtraction and playing the game BUMP; Working with numbers, starting with a number and counting ...

Add a one-digit number (1 through 9) to any two-digit number ... the place values and explain the thinking involved. Understand addition as “putting together” and “adding to.” ...

Students put all their addition and subtraction skills together to solve equations. In this lesson, students put all their addition and subtraction skills together to solve equations. Julia begins ...