Hey Peeps. Today in class we reviewed strategies for adding fractions. The strategies were: Double # Line, Money, and Clocks.
[see one, do one, teach one ]
** Then Mr. Harbeck says *oink oink oink
1) Using the Double # Line:
This stratgie works best when you have ugly fractions to add, and the denominators will give you an ugly common denominator on the number line.
For using the double # Line as you can see in Nintendo's example 9/ 18 and 2/16 were simplified into 1/2 and 1/8. From there we were able to multiply the 2 denominators to get common denominator.
The other way to do this would be t
o work with the ugly fractions by multiplying the 2 numbers denominators and simplifying
2) Using Money:
The best way to use money would be when the denominator works with 100. Yes it can be an ugly denominator too!
As you can see in the picture. 1/4 and 1/2 are simple fractions. So 1 quarter of 100 is 25 cents and 1/2 of 100 is a dollar.
When you get 3/50 the fraction is saying 3 50ths out of 100. with is 3 X 2 = 6/100. and you do the exact same with the other fraction. 15/100= 21 cent/100
3) Using Clocks:
Again with clocks the best way to use this would be when the denominator is friends with 60 (60 mins. on a clock) So the denominators that are friendly with 60 are:
/2, /3, /4, /5, /6, /10, /12, /15, /20, /30.
As you can see in the picture. 1/2 and 3/20 simplified out = 30/60 and 9/60. From there since they are already simplified all you have to do is add the numerators= 13/20 (already simplified. The ugly part of the question was 3/20, which mean't 3 2oths out of 60.
that was class!