Post on 13-Jan-2016
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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
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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