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Graphical Approach to solve multi-step problems Mary took a test that had 30 questions. She received 5 points for each correct answer, but lost 2 points.

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Presentation on theme: "Graphical Approach to solve multi-step problems Mary took a test that had 30 questions. She received 5 points for each correct answer, but lost 2 points."— Presentation transcript:

1 Graphical Approach to solve multi-step problems Mary took a test that had 30 questions. She received 5 points for each correct answer, but lost 2 points for each incorrect answer. She scored 115 points on this test. How many of the answers were correct and incorrect?

2 Graphical Approach to solve multi-step problems Mary took a test that had 30 questions. She received 5 points for each correct answer, but lost 2 points for each incorrect answer. She scored 115 points on this test. How many of the answers were correct and incorrect?

3 Graphical Approach to solve multi-step problems C Correct: 5 points -2 points Questions: W 30 C Incorrect/Wrong: W

4 Graphical Approach to solve multi-step problems C Correct: 5 points -2 points Questions: W 30 C Score: Add for correct, but subtract for incorrect Incorrect/Wrong: W

5 Graphical Approach to solve multi-step problems C Correct: 5 points -2 points Questions: W 30 C Score: CCCCC Incorrect/Wrong: W Add

6 Graphical Approach to solve multi-step problems C Correct: 5 points -2 points Questions: W 30 C Score: 115 CCCCCWW Incorrect/Wrong: W Subtract

7 Graphical Approach to solve multi-step problems Questions: Score: W 30 C115 CCCCC WW How do I solve this problem?

8 Graphical Approach to solve multi-step problems Questions:Score: 115 CCCCC WWW 30 C Add C C C C

9 Graphical Approach to solve multi-step problems Questions:Score: 115 CCCCC WWW 30 C C C C C

10 Graphical Approach to solve multi-step problems Questions:Score: 115 CCCCC WWW 30 C C C C C Rearrange

11 Graphical Approach to solve multi-step problems Questions:Score: 115 CCCCC W W W 30 C C C C C Rearrange

12 Graphical Approach to solve multi-step problems Questions:Score: 115 CCCCC W W W 30 C C C C C Rearrange

13 Graphical Approach to solve multi-step problems Questions:Score: W 30 C115 CCCCC WWC C C C 30

14 Graphical Approach to solve multi-step problems Questions:Score: W 30 C 115 CCCCC WC CC 30

15 Graphical Approach to solve multi-step problems Questions:Score: W 30 C 115 CCCCCCC 30

16 Graphical Approach to solve multi-step problems Questions:Score: W 30 C 115 CCCCCCC 30 175

17 Graphical Approach to solve multi-step problems Questions:Score: W 30 C CCCCCCC 30 30 115 175

18 Graphical Approach to solve multi-step problems Questions:Score: W 30 C CCCCCCC 175

19 Graphical Approach to solve multi-step problems Questions:Score: W 30 C CCCCCCC 175 C = 25 W = 5

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