\"\"

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To find the difference, add it’s opposite.

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\"\"                (The opposite of \"\" is \"\")\"\"

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To find the sum of the given numbers, draw a number line.

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1.     Start at 8.

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2.     Since the number 15 is a positive number, move 15 units to the right.

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3.     The final position is 23.

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\"\"

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The difference of the given numbers is \"\".\"\"

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The difference of the given numbers is \"\".