Adding and Subtracting Quick and Dirty Fractions Method! Functional Mathematics Level 2: Add and subtract fractions - add and subtract using halves, thirds, quarters, fifths and tenths
You can add two fractions by doing three multiplications and an addition!
3 3
9
9
9 5 2
910
9
9 5 3
910 15
An example that has denominators with a common factor…
5 9
45
24
4524
5
5 18
You had to cancel down at the end because of the common factor…
Mixed numbers?
Just convert to improper fractions and carry on…
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