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        Thinkport | Opposite Quantities and Zero Pairs

        Explore numerical opposites by considering the trajectory of a hot air balloon as it rises and falls in this video from MPT. In the accompanying classroom activity, students watch the video and then play a game in which they move a button along a number line in positive and negative directions. They find the total amount that the button travels in each direction in order to end up where it started. To get the most from the lesson, students should have some experience finding the distance between positive and negative integers on a number line. For a longer self-paced student tutorial using this media, see "Opposite Quantities and Zero Pairs" on Thinkport from Maryland Public Television.

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