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Mathematics 14 Online
OpenStudy (anonymous):

3-6

OpenStudy (mathstudent55):

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OpenStudy (mathstudent55):

To add two positive numbers, start at the first number, and move to the right the second number of units. To subtract two positive numbers, start at the first number, and move to the left the second number of units.

OpenStudy (mathstudent55):

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