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Student Instructions
1. Watch the video to learn about the Finding the Difference Strategy. This strategy is also sometimes called the Counting On Strategy.
2. Use 
or 
to use the Finding the Difference Strategy to solve each problem. Use the number line to show your thinking.
3. On the final page, use , , or 
to explain your thinking.
4. Click 
when you're ready to submit your work.
Teacher Notes (not visible to students)
2nd_Week 18_Math_Finding the Difference (Part 2) (Week 18, Lesson 2) 2.4B add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations 2.9C represent whole numbers as distances from any given location on a number line Created by Lauren Berrong
