1. Multiplying Fractions
Grade 9 Applied Mathematics
M. M. Couturier

2. Multiplying Fractions
If you know how to add and subtract fractions, then you already know how to multiply fractions!!!

3. Multiplying Fractions
Let us take the following example:
(2)(2) (3)(5)
The denominators are not the same; WHO CARES; this is multiplication!!!

4. Multiplying Fractions
In multiplication, regardless of the numbers you simply multiply ALL the numerators and then you multiply ALL the denominators.

5. Multiplying Fractions
Hence in the case of:
(2)(2) (3)(5)
The numerators are 2x2=4 and the denominators are 3x5=15; hence,
DONE!!! QED!!!

6. Multiplying Fractions
Let’s do another example:
(2)(1) (3)(4)
In this case, we need only simplify the fraction:

7. THE BLUEPRINT
The following will work for ALL multiplications of proper fractions.

8. THE BLUEPRINT Let us recall our strand in algebra: (a)(c) (b)(d) ac bd
The ironic thing about multiplying fractions is that it is easier than addition and subtraction!!!

9. WWW Let us visit the world wide web:

10. WWW Let us visit the world wide web:

11. WWW For those who are visual: