Quick And Dirty Fractions Method
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Quick And Dirty Fractions Method - Presentation Transcript
- You can add two fractions by doing three multiplications and an addition!
- 3 3
- 9
- 9
- 9 5 2
- 9 10
- 9 10
- 9 10 5 3
- 9 10 15
- 9 10 15 +
- 9 10 15 +
- An example that has denominators with a common factor…
- 5 9
- 45
- 45
- 45 24
- 45 24
- 45 24 54
- 45 24 54 +
- 45 24 54 +
- 5
- 5 18
- You had to cancel down at the end because of the common factor…
- Mixed numbers?
- Mixed numbers? Just convert to improper fractions and carry on…
- Subtraction?
- Subtraction? Just subtract the top totals instead of adding…
- Your turn…
- Answer on next slide…
- Make up some more questions and check them with your calculator
+
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Just a few slides on a quick short cut to adding fr more
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