How Many Are Hidden? Boxes of Markers
The number of markers in both pictures is the same.
How many markers are hidden behind the cloud? How do you know?
How can you finish the equation to make it true?
What do you notice about how the blue number changed? What about the red number?
- Now there are more than 52 markers. You get to decide how many! How many could be hidden behind each cloud? How do you know?
- Complete the equation to make it true. What do you notice about how the numbers changed?
Google doc for printing and copying
Activity for the Seesaw platform
Reference for Educators
Sample problems and solutions