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Question
Subtract 9 from 12 by using the chip model.
You begin with
You add
Which of the following chip structures represents the result?
Subtract 9 from 12 by using the chip model.
You begin with
You addWhich of the following chip structures represents the result?
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Solution
The correct option is C
Here, 9 negative chips cancel out 9 positive chips leaving 3 positive chips.
So, 12−9=12+(−9)=3.
Here, 9 negative chips cancel out 9 positive chips leaving 3 positive chips.So, 12−9=12+(−9)=3.
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