Add and Subtract to 100

Get some practice with double-digit addition and subtraction from all directions! Learners complete two equations for each operation, one horizontally and one vertically. Consider your objective with this one; do you want scholars to use mental math to solve the horizontal equations, or can they rewrite? There is borrowing and regrouping involved in the vertical equations but not the horizontal ones. The final question has them examine two rows of clocks, writing the numbers into a subtraction problem and finding the difference vertically. Explain this last one, as the directions are confusing.