Adding and Subtracting Integers Using Chips

Learning Opportunity

There is no learning opportunity tonight because the classes did not finish the lesson

Today in Class

Students were presented with the following image.

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Students were first asked what they notice.  Here are some of their responses:

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Students were then asked what they wondered about the image.  Here are some of their responses:

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While reviewing what the students noticed and wondered, students were told that this is the beginning to a problem that asks, “If Tate pays Julia the money he earns from delivering papers, how much money does he still owe Julia?”  The red chips represent negative numbers (how much Julia is owed) and the black chips represent positive numbers (how much Julia has been paid).

Students came up with number sentences to represent the problem.  One of the number sentences that they came up with was -6 + 4 = -2.

Students were then given chips to work with at their desks and asked to represent the following problem using the chips.

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The student chips are slightly different with the red chips represent negatives and yellow chips represent positives.  They were asked to write a number sentence to represent their chips.

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Lastly, the students were shown that if you make pairs of the chips (one yellow and one red), whatever is left over is the answer to the problem.

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