- #1
mr magoo
- 23
- 0
Here is what I have written down for describing math from multiplication up to dividing fractions, and as you see I can use pies to help describing the math but for dividing fractions I get stuck with how to use a pie analogy.
Here is what I have wriote to describe math using pie analogy below;
multiplication
____________________________
pieces per pie * total number of pies = total number of pieces
2 pies total * 4 pieces each pie = 8 total pieces of pie
division
____________________________
total number of pieces / pieces per pie = total number of pies
8 total pieces of pie / 4 pieces each pie = 2 pies total
adding and subtracting fractions
____________________________
create total pieces of pie in division, twice, so two divisions can be added together.
The total pieces of pie in both divisions must share the pieces per pie value.
Once the pieces per pie value is the same between the two divisions,
add or subtract the total pieces of pie from the two divisions.
2/1 + 2/2 = (2/1 * 2/2 = 4/2) + 2/2 = 6/2
5/3 - 4/5 = (5/3 * 5/5 = 25/15) - (4/5 * 3/3 = 12/15) = 13/15
multiplying fractions
____________________________
total number of pieces * total number of pieces / pieces per pie * pieces per pie =
total number of pieces / pieces per pie
1/1 * 3/4 = 3/4
3/3 * 1/3 = 3/9
dividing fractions
_____________________________
where is the pie analogy? I'm stuck. help me please.
2/7 / 1/2 = 2/7 * 2/1 = 4/7
4/7 * 1/2 = 4/14 = 2/7
______________________________
5/8 / 3/4 = 5/8 * 4/3 = 20/24 = 5/6
5/6 * 3/4 = 15/24 = 5/8
_______________________________
Here is what I have wriote to describe math using pie analogy below;
multiplication
____________________________
pieces per pie * total number of pies = total number of pieces
2 pies total * 4 pieces each pie = 8 total pieces of pie
division
____________________________
total number of pieces / pieces per pie = total number of pies
8 total pieces of pie / 4 pieces each pie = 2 pies total
adding and subtracting fractions
____________________________
create total pieces of pie in division, twice, so two divisions can be added together.
The total pieces of pie in both divisions must share the pieces per pie value.
Once the pieces per pie value is the same between the two divisions,
add or subtract the total pieces of pie from the two divisions.
2/1 + 2/2 = (2/1 * 2/2 = 4/2) + 2/2 = 6/2
5/3 - 4/5 = (5/3 * 5/5 = 25/15) - (4/5 * 3/3 = 12/15) = 13/15
multiplying fractions
____________________________
total number of pieces * total number of pieces / pieces per pie * pieces per pie =
total number of pieces / pieces per pie
1/1 * 3/4 = 3/4
3/3 * 1/3 = 3/9
dividing fractions
_____________________________
where is the pie analogy? I'm stuck. help me please.
2/7 / 1/2 = 2/7 * 2/1 = 4/7
4/7 * 1/2 = 4/14 = 2/7
______________________________
5/8 / 3/4 = 5/8 * 4/3 = 20/24 = 5/6
5/6 * 3/4 = 15/24 = 5/8
_______________________________