From the course: Learning Algebra: Pre-Algebra

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Solution: Subtract integers

Solution: Subtract integers

From the course: Learning Algebra: Pre-Algebra

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Solution: Subtract integers

- Let's walk through the solutions to worksheet #2 together. Letter A is -12 minus 20. For this problem, we're going to use the Keep, Change, Change rule to rewrite this as addition. I'm going to do it right in the problem. So keep -12 the same, change to addition, change to -20. So -12 plus -20 is now an addition problem where the signs are the same. So I'm going to add the numbers and keep the sign. 12 plus 20 is 32, and I'm going to keep the negative sign. So the final answer for letter A is -32. For letter B, we have the problem 18 minus -22. For this problem, we're also going to use Keep, Change, Change. So keep, change, change. This now becomes 18 plus 22. 18 plus 22 is 40, so the answer to letter B is 40. Letter C, the problem is 25 minus 35 minus -3. For this problem, we're going to start with 25 minus 35, and I'm going to use Keep, Change, Change to make this 25 plus -35. Now my signs are different, and I'm adding, so I'm going to subtract. 35 minus 25 is 10, and since -35…

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