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Fractions, decimals & percentages
Transcript of Fractions, decimals & percentages
Some Real Life Examples
A fraction is a part of a whole
ARE ALSO PARTS OF NUMBERS .....
THE DECIMAL POINT SEPARATES THE WHOLE FROM THE PART .....
A percent or percentage is a number out of 100.
Fractions , Decimals & Percentages
Lesson- Planning a Park
Write your answers down in your math book!
Slice a pizza and you will have a fraction.....
What is part of a whole ?
The top number tell you how many pieces you
The bottom number tells you how many slices the pizza was
but .... we don't always
work with wholes.....
What is a whole?
100% is a whole
1.00 is a whole
4 / 4 pieces is a whole
It has 2 parts :
We call the top number the
, it is the number of parts you have.
We call the bottom number the
, it is the number of parts the whole is divided into.
WHAT FRACTION OF
THESE CIRCLES ARE
1 . 34
Some fractions may look different, but are really the same,
* It is usually best to show an answer using the simplest fraction ( 1/2 in this case ). That is called Simplifying, or Reducing the Fraction
write down your answer in
your math book .... the answer will be revealed at the end of the lesson .
You can add fractions easily if the bottom number (the denominator) is the same:
3 simple steps to subtract fractions
Make sure the bottom numbers (the denominators) are the same
Subtract the top numbers (the numerators). Put the answer over the same denominator.
Simplify the fraction.
PLAN A PARK
The decimal point separates the whole number from parts
.1 OR .10
BOTH IMAGES ARE EQUAL TO
ONE - TENTH
WHAT DECIMAL IS REPRESENTED BY THIS MODEL ?
copy this question into your math book showing how you got your answer....
40 out or 100
WHAT PERCENTAGE OF PLANES ARE SHADED RED?
Test your fraction, decimal & percentage knowledge ..... Click the link below:
I'm going to turn this 50 cent piece into a fraction, decimal and percent.....
Now it's your turn! In your math book turn this 20 cent piece into a fraction, decimal and percent....
YOUR NOW GOING TO CREATE YOUR OWN PARK!
Using the 100 grid paper provided ...your now going to become a landscape architect and create your own park ......
THE PARK MUST INCLUDE:
Something else (of your choice)
example of a park I made earlier .
Now you're going to calculate the fraction of each part of your park and write your answer in your math book drawing the table below: