Math - Multiplying and Dividing (Fractions)

    In our most recent math classes, we have been learning much useful material that we will need for our mid-term examinations. We have learned strategies to help us more easily multiply large numbers. A strategy I find useful for multiplying larger numbers would be the coin/money method where you would divide the number into coins (or easy numbers to multiply), such as 100, 50, 25, 10, 5, and 1. An example would be 250x195. 250x100=25000, 250x50=12500, 250x25=6250, 250x10=2500, and 250x10=2500. If you add it all together the number you are multiplying by should equal 195, and the answer would be 48750.  This is what we have been learning in the most recent math classes. 

    We have also learned how to multiply and divide fractions. It is quite simple once you've learned how to do it. To multiply a fraction by a whole number, first you have to change the whole number into a fraction (eg. 5 would be 5/1 as a fraction). Then you multiply the first fraction's numerator by the second fraction's numerator, then the first fraction's denominator and the second fraction's denominator (eg. 2/3 x 5/1=10/3). To divide you can change the division statement into a multiplication statement by multiplying by the reciprocal (switching a fraction's numerator and denominator) (eg. 2/3 divided by 5/1=2/3 x 1/5=2/15). Once you've done this, don't forget to simplify your fractions! These are methods to multiply fractions by whole numbers and divide fractions.

 

http://experienceyork.apps01.yorku.ca/blog/yorkandu/2012/08/13/how-to-be-canadian/