A fun way to learn about fractions

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    17-Jan-2015

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  • 1. Pizza, Pattern Blocks and Candy Bars A Fun Way to Learn About Fractions

2. So how much pizza do I get?

  • All the children are going to share the pizza. We will cut enough pieces so each child can have one, and the pieces should all be the same size.

3. What is a fraction?

  • A fraction describes a part of a whole when the whole is cut up into equal parts.
  • The wordfractionmeans a portion of a whole.
  • In math, we call each piece afractionof the whole pizza.

4. How do I make a fraction?

  • Take an object like a circle or a rectangle.
  • Divide it into equal parts.
  • Let's color one of the parts gray.

5. Practice

  • Lets look atparts of a wholefor practice.

6. How do I write a fraction?

  • When I divide a rectangle in two equal pieces, I cut it in half.
  • 1/2 is blue and 1/2 is yellow
  • one half is blue and one half is yellow

7.

  • When I divide a rectangle in three equal pieces, I cut it in thirds.
  • 1/3 is blue, 1/3 is yellow and 1/3 is green
  • one third is blue, one third is yellow and one third is green

8.

  • When I divide a rectangle in four equal pieces, I cut it in fourths.
  • 1/4 is purple, 1/4 is blue, 1/4 is yellow and 1/4 is green
  • one fourth is purple, one fourth is blue,
  • one fourth is yellow and one fourth is green

9. Parts of a Fraction

  • There is thedenominatorwhich is the bottom number. The denominator tells how many equal parts are needed to make a whole.
  • There is thenumeratorwhich is the top number. The numerator tells how many parts are showing.

The denominator is 3 because three parts make the whole. 123 The numerator is 2 because two parts are shown as a different color. 2 3 10. Practice

  • What fraction of the square is pink?
  • Go to this site and work on other problems like this.
  • http://math.rice.edu/~lanius/fractions/prac1.html
  • Lets look atnaming fractionsfor practice.
  • Tryvisualizing fractionsfor more practice.
  • Lets look atfraction barsfor another look.

11. Exploring Fractions With Pattern Blocks

  • The hexagon represents a whole.
  • A triangle represents one sixth. You can show this by dragging out six triangles and one hexagon and laying down the triangles right next to the hexagon or even on top of it.
  • Usepattern blocksto show this.
  • What other fractions can you find withpattern blocks?

12. Would you like to share some candy bars?

  • Look at these candy bars with a friend.
  • Talk to each other about why these candy bars are important when learning about fractions.

13. Reading About Fractions

  • InGator Pie , two alligators find ways to cut a pie.
  • InEating Fractions , pictures contain food cut up into various fractional parts.

14.

  • Infraction funaspects of fractions are introduced in a lively fashion and real-world contexts.
  • InGive Me Half , a brother and sister must share all their food.