How Many Are Hidden? Packages of Presents
Both pictures have the same number of presents. There are 10 presents in each box.
How many presents 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 60 presents. You get to decide how many!
How many presents might be hidden behind each cloud? How do you know?
- Finish the equation to make it true.
What do you notice about how the numbers changed?