do now 3/8/11 take out hw from last night. take out hw from last night. text p. 228, #10-28 evens,...
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Do Now 3/8/11Do Now 3/8/11 Take out HW from last night.Take out HW from last night.
Text p. 228, #10-28 evens, 38-44 evensText p. 228, #10-28 evens, 38-44 evens
Copy HW in your planner.Copy HW in your planner. Text p. 234, #12-30 evens, #46-50 evensText p. 234, #12-30 evens, #46-50 evens Quiz sections 5.2 - 5.3 ThursdayQuiz sections 5.2 - 5.3 Thursday
In your journal, find the least common multiple for the numbers In your journal, find the least common multiple for the numbers below.below.
12, 1612, 16 12, 1412, 14 6, 106, 10
HomeworkHomework Text p. 228, #10-28 evens, 38-44 evens Text p. 228, #10-28 evens, 38-44 evens
10) 1 2/5 12) -1 1/9 14) 1/3 16) -5/11 18) -1 1/2 20) 14 1/5 22) 5 3/11 24) -5 1/4
26) -1/7 28) 4 1/3 cups 38) 1 5/9 40) -1 42) -2 3/31 44) 2 ft, 8 1/2 in
Objective
SWBAT add and subtract unlike fractions.
Section 5.2 “Adding and Subtracting Like Fractions”Section 5.2 “Adding and Subtracting Like Fractions”
Adding Fractions with Common Denominators
To ADD fractions with common denominators, add their numerators together.
7
3
7
2
7
5
7
3
7
2
Add the numerators
c
ba
c
b
c
a
Section 5.2 “Adding and Subtracting Like Fractions”Section 5.2 “Adding and Subtracting Like Fractions”
Subtracting Fractions with Common Subtracting Fractions with Common DenominatorsDenominators
To SUBTRACT fractions with common denominators, subtract their numerators.
6
1
6
5
3
2
6
4
Subtract the numerators
c
ba
c
b
c
a
Fractions with Different DenominatorsFractions with Different Denominators
To To ADDADD or or SUBTRACTSUBTRACT fractions with different fractions with different denominators follow these steps:denominators follow these steps:
1. 1. Rewrite the fractions using a common denominatorRewrite the fractions using a common denominator. .
2. 2. Add or subtract the numeratorsAdd or subtract the numerators. .
7
1
5
2 35
14
75
72
5
2
55: 5, 10, 15, 20, 25, 30, : 5, 10, 15, 20, 25, 30, 3535, 40, 4077: 7, 14, 21, 28, : 7, 14, 21, 28, 3535, 42, 42
35
5
57
51
7
1
What is the common
denominator?
35
19
35
5
35
14
Section 5.3 “Adding and Subtracting Unlike Fractions”Section 5.3 “Adding and Subtracting Unlike Fractions”
Try It Out!!Solve
21
14
21
3
12
3
12
7
3
2
7
1
4
1
12
7
21
17
21
14
21
3 12
10
12
3
12
7
Don’t forget your Don’t forget your integer rules. integer rules. ““Opp-Opp” Opp-Opp” -7 + (-3) = -10-7 + (-3) = -10
6
5
12
10
Try It Out!!Solve
44
11
44
24
20
2
5
4
20
2
20
16
4
1
11
6
44
35
44
11
44
24
10
9
20
18
20
2
20
16
Don’t forget your Don’t forget your integer rules. integer rules. ““Opp-Opp” Opp-Opp” -16 + (-2) = -18-16 + (-2) = -18
““Adding and Subtracting Mixed Numbers”Adding and Subtracting Mixed Numbers”
Mixed Numbers with Different DenominatorsMixed Numbers with Different Denominators
To To ADDADD & & SUBTRACT SUBTRACT mixed numbers do the following:mixed numbers do the following:
1. Write the fractions as improper fractions1. Write the fractions as improper fractions
2. Write fractions using the LCD.2. Write fractions using the LCD.
3. Add or subtract the numerators3. Add or subtract the numerators
4. Simplify if necessary4. Simplify if necessary
3
12
5
24
3
7
5
22
15
116
15
35
15
66
15
101
Try It OutTry It Out
8
31
4
14
Write fractions Write fractions using LCD.using LCD.
8
11
8
34
8
72
8
)11(34
SimplifySimplify
8
11
4
17
Improper fractionsImproper fractions
Don’t forget your Don’t forget your integer rules. integer rules. ““Opp-Opp” Opp-Opp” 34 + (-11) = 2334 + (-11) = 23
8
23
Try It Out!!Try It Out!!6
57
4
110
12
94
12
123
12
118
12
)94(123
6
47
4
41
Write fractions Write fractions using LCD.using LCD.
SimplifySimplify
Improper Improper fractionsfractions
Don’t forget your Don’t forget your integer rules. integer rules. ““Opp-Opp” Opp-Opp” -123 + (-94) = -217-123 + (-94) = -217
12
217
Homework Text p. 234, #12-30 evens, #46-50 evensText p. 234, #12-30 evens, #46-50 evens
HomeworkHomeworkPunchline worksheets #72 & #73Punchline worksheets #72 & #73
““Why Does the President Put Why Does the President Put Vegetables in His Blender?”Vegetables in His Blender?”
HE IS HOPING FOR WHIRLED PEASHE IS HOPING FOR WHIRLED PEAS
““How Could Goldilocks and The BigHow Could Goldilocks and The BigBad Wolf Be in the Same House?”Bad Wolf Be in the Same House?”
IT WAS A TWO STORY HOUSEIT WAS A TWO STORY HOUSE
Homework
2) -86 / 1 4) -109 / 12 6) -555 / 1 8) 67 / 14 10) -0.27 12) 8.15 14) -7.25 16) -2.225 18) 1.5 20) -10.194 22) 1/25 24) 14 1/200 26) 16/99 28) 3 23/30
2) -4/5 4) 1 3/43 6) 1/25 8) -21/40 10) -1 1/7 12) -11 5/9 14) 4 3/5 16) -5 5/8 18) 5x / 7 20) –x 22) 1 / 12x 24) 3 / x
2) 26 / 63 4) -17 / 36 6) -1 23/60 8) 19 / 35 10) 1 2/15 12) -8/15 14) 1 19/45 16) 23/40 18) -2 31/50 20) -10/33 22) -5 41/48 24) 2 23/48 26) 43x / 24 28) -36x / 35 30) 11/35
Practice worksheet 5.1 B evens
Practice worksheet 5.2 B evens
Practice worksheet 5.3 B evens