How Many Are Hidden? Red Fish, Blue Fish
The number of fish in both pictures is the same.
How many fish are hidden behind the rock? 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 17 fish in both pictures. You get to decide how many!
How many fish could be hidden behind each rock? How do you know?
- Complete the equation to make it true.
What do you notice about how the numbers changed?