multiplying and dividing fractions reporting categories: computation and algebraic relationships...

Multiplying and Dividing FractionsReporting Categories: Computation and Algebraic Relationships

ELPS: Learning 1A

TEKS 5.3JL, 5.1A

KWL

What I Know

K

What I Want to Know

W

What I Learned

L

Review: Multiplying Fraction

Review: Multiplying Fraction

Review: Multiplying Fraction

74

32

218

Review: Multiplying Fraction

Dividing FractionsJust like multiplying but with a flip.

Dividing Fractions

56

74

Dividing Fractions

First thing is to rewrite the math problem into a multiplication problem.

By first, writing the first fraction.

56

Dividing Fractions

Now we add the multiplication symbol.

56

Dividing Fractions

This next part is a little tricky, we need to flip the second fraction.

This is called the reciprocal.

56

47

Dividing Fractions

Now we can solve the original division problem in the form of a Multiplication problem by getting the reciprocal of the second fraction.

56

47

2042

Lowest Terms for the Final Answer

Now we need to find the highest common divisor

56

47

2042

1,2,4,5,10,201,2,3,6,7,14,21,42

Lowest Terms for the Final Answer

Now we need to find the highest common divisor

56

47

2042

÷2÷2

1021

Real World

Examples:

Would like to know how much half of a ¾ cake is.

I have 2/3 of a tank of gas, how much can I use in the next 2 days.

Guided Practice

I have 2/3 of a tank of gas, how much can I use in the next 2 days.

23

21

23

12

26

1,21,2,3,6

Guided Practice

I have 2/3 of a tank of gas, how much can I use in the next 2 days.

23

21

23

12

26÷2÷2

13

Individual Activity

WorksheetProblem #1 3/4 ÷ 5/8=Problem #2 1/12 ÷ 1/4 =Problem #3 7/12 ÷ 2/3 =

KWL

What I Know

K

What I Want to Know

W

What I Learned

L

Things to Keep in Mind

Rewrite division problem into a multiplication problem.

Second fraction does a flip, reciprocal.

If need be, lowest terms.

Extended Activity