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Adding and Subtracting Integers with Balloons and Sandbags

Add and subtract integers by building expressions using balloons and sandbags in this interactive activity.

Task 1

Putting It All Together

Answer these open ended questions on your own or with others to form deeper math connections.

Task 2

What direction did the basket move when you added balloons? Sandbags?

Task 3

What direction did the basket move when you subtracted balloons? Sandbags?

Task 4

Suppose the basket had a starting position of 35 and you removed 5 sandbags. Where would the basket end up?