# Wednesday, August 19, 2015 We are learning to…add and subtract positive and negative integers with Algebra Tiles.

## Presentation on theme: "Wednesday, August 19, 2015 We are learning to…add and subtract positive and negative integers with Algebra Tiles."— Presentation transcript:

Wednesday, August 19, 2015 We are learning to…add and subtract positive and negative integers with Algebra Tiles.

 Subtraction means …to take away, so to show this with chips we will have to…start with a certain amount of chips and then take away from that group. 4 -5 Now try: PROBLEM ? -6 0 -7

Solution: ◦ Add in “Zero Pairs” until you have enough negative (or positives) to take away! ◦ A Zero Pair is a positive and a negative Algebra Tile. ◦ Since the two chips cancel each other, you are really adding in zero and not changing the problem.  Remember: + = 0 6

9 -11 9 -14 -8 3 Now try a few assessment questions to test your skills adding and subtraction integers!

A. 7-3 B. 7+3 C. -7+(-3) D. -7-(-3) E. I need help with this question. 1234567891011121314151617181920 21222324252627282930

A. 3 B. -11 C. 11 D. -3 E. I need help with this question. 1234567891011121314151617181920 21222324

A. -10 B. 10 C. -2 D. 2 E. I need help with this question. 1234567891011121314151617181920 21222324

A. 8 B. 2 C. -2 D. -8 E. I need help with this question. 1234567891011121314151617181920 21222324

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