Objective
Learn to solve Separate Change Unknown word problems using a range of numbers.
What You’ll Learn
In this video, we will work through a Separate Change Unknown problem.
You’ll also have an opportunity to solve three more SCU problems and reflect on them.
Download Activities & Notes
Kimberly Anne Christensen says
I can tell I missed this type of math instruction when I was a child. Thank you for showing me how to subtract and balance the take away of numbers/crossing off the dots to get to the answer. I learned strictly by subtracting. Wow!
Tonia Nealey says
Don’t you need to circle 4 and cross out 8 bc he gave 8 away?
Jessica B says
If it were a different problem type and the “change” was known ahead of time, yes that would work. In this problem, the “change” is unknown. If students know enough about the relationship between addition and subtraction, they will be able to subtract (cross out) 4 to get 8 from 12. This is a more advanced problem type. You’ll want to make sure students have a firm grasp of the relationship between addition and subtraction or act out the problem with physical objects (kinder / first) then move to drawings.
Sarah Cedar says
Some of the change unknown words were: gave some, went, put away. This helps to separate from the whole/start. I am learning to use the codes for s/c/r.