fractions: what they m ean, and equivalent forms

11
Fractions: What They Mean, and Equivalent Forms

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Fractions: What They M ean, and Equivalent Forms. Fractions = . Parts “taken”. Total (=) Parts in a Whole. “A whole”. One out of two parts. Fractions = . Parts “taken”. Total (=) Parts in a Whole. “A whole”. One out of three parts. Fractions = . Parts “taken”. - PowerPoint PPT Presentation

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Page 1: Fractions:  What They  M ean, and Equivalent Forms

Fractions: What They Mean, and Equivalent Forms

Page 2: Fractions:  What They  M ean, and Equivalent Forms

Fractions = Parts “taken”Total (=) Parts in a Whole

“A whole” One out of two parts

2

1

Page 3: Fractions:  What They  M ean, and Equivalent Forms

Fractions = Parts “taken”Total (=) Parts in a Whole

“A whole” One out of three parts

3

1

Page 4: Fractions:  What They  M ean, and Equivalent Forms

Fractions = Parts “taken”Total (=) Parts in a Whole

“A whole” Two out of three parts

3

2So any time the numerator (top) is smaller than the denominator (bottom), the fraction has a value lower than 1.

Page 5: Fractions:  What They  M ean, and Equivalent Forms

Fractions on a Number Line

0 12

1

3

1

3

2

4

1

4

3

4

2

Page 6: Fractions:  What They  M ean, and Equivalent Forms

Equivalent FractionsTwo out of three parts

3

2

Four out of six parts

6

4is identical to

If each part of the whole is cut in two, we see why.

Page 7: Fractions:  What They  M ean, and Equivalent Forms

Equivalent Fractions

We make equivalent fractions by multiplying the numerator and denominator of any fraction BY THE SAME NUMBER.

Ex: Find a fraction equivalent to that has an 12 in the denominator. 4

3

4

33

3

Sneaky form of 1

12

9

Page 8: Fractions:  What They  M ean, and Equivalent Forms

Equivalent FractionsTwo out of three parts

3

2

Four out of six parts

6

4is identical to

If pairs of small parts are considered bigger parts, we see why.

Page 9: Fractions:  What They  M ean, and Equivalent Forms

Equivalent Fractions

We can also make equivalent fractions by dividing the numerator and denominator of a fraction by the SAME NUMBER.

Ex: Reduce to lowest terms.15

10

15

10

5

5

Sneaky form of 1

53

52

3

2

Page 10: Fractions:  What They  M ean, and Equivalent Forms

Comparing Fractions

Unit fractions can be compared by looking at the denominators…

…the bigger the denominator, the smaller the fraction.

>3

1

5

1

Page 11: Fractions:  What They  M ean, and Equivalent Forms

Comparing Fractions

Non-Unit fractions can be compared by a few different ways, for now, we’ll give them the same denominators.

In that condition, the smaller the numerator, the smaller the value.

>

5

2

10

3

2

2

5

2

10

3

10

4

10

3