Grade
2

How Many Are Hidden? More Packages of Presents

There are the same number of presents in both pictures.

How many presents are hidden behind the cloud? How do you know?
How can you finish the equation to make it true?

The picture on the left shows 2 blue packages of 10 presents, 1 red package of 10 presents, and 6 individual red presents. The picture on the right shows 3 blue packages of 10 presents and a cloud with a red question mark. Blue 20 + red 16 = blue 30 + red blank.

What do you notice about how the blue number changed? What about the red number?

In the equation blue 20 + red 16 = blue 30 + red blank, the 20 changes to 30. How does the 16 change to make the equation true?
  • Now there are more than 36 presents. 
    How many 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?
The picture on the left shows 4 blue packages of 10 presents and a cloud with a red question mark. The picture on the right shows 3 blue packages of 10 presents and a cloud with a red question mark. Blue 40 + red blank = blue 30 + red blank.
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