Do Now 12/5/11Do Now 12/5/11 Take out HW from Thursday and Take out HW from Thursday and

Friday.Friday. Text p. 120, #10-38 evensText p. 120, #10-38 evens Activity #42 & Punchline worksheet #73Activity #42 & Punchline worksheet #73

Copy HW in your planner.Copy HW in your planner. Text page 124, #10-44 evens, 55Text page 124, #10-44 evens, 55

Be ready to copy POTW #2.Be ready to copy POTW #2.

HomeworkHomeworkText p. 120, #10-38 evensText p. 120, #10-38 evens

10) 110) 1 12) 3/2 or 1 ½ 12) 3/2 or 1 ½ 14) 1/614) 1/6 16) 1/316) 1/3 18) 13/1518) 13/15 20) 19/12 or 1 20) 19/12 or 1

7/127/12 22) 3/822) 3/8 24) 3/1424) 3/14

26) 2/3 quart26) 2/3 quart 28) 58/35 or 1 28) 58/35 or 1

23/3523/35 30) -1/430) -1/4 32) 22/21 or 1 32) 22/21 or 1

1/211/21 34) 23/20 or 1 34) 23/20 or 1

3/203/20 36) 19/8 or 2 3/836) 19/8 or 2 3/8 38) 9/8 or 1 1/838) 9/8 or 1 1/8

ObjectiveObjective

SWBAT multiply fractions and mixed SWBAT multiply fractions and mixed numbers.numbers.

Mixed Numbers to Improper Mixed Numbers to Improper FractionFraction

5

18

5

418 x 5 = 408 x 5 = 40

40 + 1 = 4140 + 1 = 41

Remember this?

??

MultiplyMultiply

AddAdd

Try it out…Try it out…Mixed Numbers to Improper Mixed Numbers to Improper

FractionFraction

5

23

5

17Multiply

Multiply

AddAdd

3 x 5 = 153 x 5 = 15

15 + 2 = 1715 + 2 = 17

6

57

6

47

Multiply

Multiply

AddAdd

7 x 6 = 427 x 6 = 42

42 + 5 = 4742 + 5 = 47

-

Section 3-6, “Multiplying Section 3-6, “Multiplying Fractions” Fractions”

Multiplying FractionsMultiplying Fractions

To multiply fractions:To multiply fractions:

1. Rewrite fractions as improper fractions 1. Rewrite fractions as improper fractions (when necessary)(when necessary)

2. Multiply the numerators and 2. Multiply the numerators and denominators.denominators.

3. Simplify if necessary.3. Simplify if necessary.

bd

ac

d

c

b

a

35

12

7

4

5

3

21

4

10

7

21

4

10

7

35

)2(1

2110

)4(7

MultiplyMultiply

Assign negative sign to the numeratorAssign negative sign to the numerator

Divide (cancel) common factorsDivide (cancel) common factors

MultiplyMultiply

11

3355

-2-2

15

2

Fraction times FractionFraction times Fraction

5

13

4

32

5

16

4

11

51

)4(11

54

)16(11

MultiplyMultiply

Rewrite as improper fractions and assign Rewrite as improper fractions and assign negative to numerator.negative to numerator.

Divide (cancel) common factorsDivide (cancel) common factors

MultiplyMultiply11

44

5

44

5

48

SimplifySimplify

Mixed Number times Mixed Number times Mixed NumberMixed Number

11

3210

1

10

111

)25(10

111

)25(10

MultiplyMultiply

Rewrite as improper fractions and assign Rewrite as improper fractions and assign negative to numerator.negative to numerator.

Divide (cancel) common Divide (cancel) common factors if possiblefactors if possible

MultiplyMultiply

11

250

11

822

SimplifySimplify

Rewrite a Rewrite a whole number whole number with a with a denominator denominator of 1.of 1.

11

25

Whole Number times Whole Number times FractionFraction

Try It Out!!Try It Out!!Solve Solve

32

5

88

)2(5

5

35

5

28

15

)14(2

3

21

8

14

91

9

11

33

8

76

8

55

18

)5(11

8

2

8

5

4

312

9

51

5

33

3

5

8

33

9

14

5

18

11

-2-2

44

-1-1

11

-3-3

11

1111

4

3

1

12

GeometryGeometry

Find the Find the area of the area of the figure.figure.

7

11

21

173

21

80

3

10

7

83

13

7

11

3

13

units²

Word ProblemsWord Problems

Who ran farther Sally Jo or Sally Sue? Who ran farther Sally Jo or Sally Sue?

Sally Jo ran 4 ½ times around a ½ mi. track.Sally Jo ran 4 ½ times around a ½ mi. track.Sally Sue ran 3 ¼ times around a 5/6mi. trackSally Sue ran 3 ¼ times around a 5/6mi. track

6

5

4

13

2

1

2

14

2

1

2

9

6

5

4

13

4

12

4

9

24

172

24

65

24

62

4

12

Sally SueSally Sueran farther!!ran farther!!

Homework Homework

Text page 124, #10-44 evens, 55Text page 124, #10-44 evens, 55