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Edu 290 ppt 1
- 1. SUBTRACTING (-) AND ADDING(+) FRACTIONS Aaron Martin-Green EDU 290
- 2. 9 5 ___ __________ __________ 16 12
- 3. STEP ONE: COMMON FACTOR 9 5 ___ __________ __________ 16 12 4 3 4
- 4. STEP TWO: CROSS MULTIPLY AND SUBTRACT 9 5 __________ __________ 12 16 4 3 (9x3)-(5x4)= 7
- 5. STEP THREE: FIND THE DENOMINATOR 9 5 __________ __________ ___ 16 12 4 4 3 (9x3)-(5x4)=7 ___ 4x4x3 = 48
- 6. HERE IS ANOTHER EXAMPLE
- 7. 11 3 + __________ __________ 15 20
- 8. STEP ONE: COMMON FACTOR 11 3 + __________ __________ 15 20 3 4 5
- 9. STEP TWO: CROSS MULTIPLY AND SUBTRACT 11 3 __________ __________ 20 15 3 4 (11x4)-(3x3)= 53
- 10. STEP THREE: FIND THE DENOMINATOR 11 3 + __________ __________ 15 20 3 5 4 (11x4)-(3x3)= 53 __ 5x3x4 = 60