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Do Now 3/7/11Do Now 3/7/11 Copy HW in your planner.Copy HW in your planner.
Text p. 228, #10-28 evens, 38-44 evensText p. 228, #10-28 evens, 38-44 evens Quiz sections 5.2 & 5.3 WednesdayQuiz sections 5.2 & 5.3 Wednesday
Be ready to copy POTW #7.Be ready to copy POTW #7.
Be ready to finish quiz on section 5.1 from Friday.Be ready to finish quiz on section 5.1 from Friday.
Objective
SWBAT add and subtract like 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. Simplify if necessary.
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. Simplify if
necessary.
6
1
6
5
3
2
6
4
Subtract the numerators
c
ba
c
b
c
a
Try It Out!!Solve
8
7
8
2
8
5
18
1
18
5
18
6
5
2
5
3
4
1
12
3
12
2
12
5
15
5
5
2
5
3
8
2
8
5
12
2
12
5
18
5
18
6
Mixed Numbers to Improper FractionMixed Numbers to Improper Fraction
5
18
5
41Multiply
Multiply
AddAdd
8 x 5 = 408 x 5 = 40
40 + 1 = 4140 + 1 = 41
Try it out…Try it out…Mixed Numbers to Improper FractionMixed Numbers to Improper Fraction
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
-
““Adding and Subtracting Mixed Numbers”Adding and Subtracting Mixed Numbers”
Adding & Subtracting Mixed NumbersAdding & Subtracting Mixed Numbers
To To ADDADD & & SUBTRACT SUBTRACT mixed numbers do the mixed numbers do the following:following:
1. Write the fractions as improper fractions1. Write the fractions as improper fractions
2. Add or subtract the numerators2. Add or subtract the numerators
3. Simplify if necessary3. Simplify if necessary
6
34
6
43
6
27
6
22
6
18
6
49
6
49
9
72
9
55
Find the sum or difference.Find the sum or difference.
9
25
9
50
9
75
3
18
Make fractions improperMake fractions improper
Add fractionsAdd fractions
Write as mixed numberWrite as mixed number
8
32
8
74
Find the sum or difference.Find the sum or difference.
8
19
8
39
8
20
2
12
8
42
Don’t forget your Don’t forget your integer rules.integer rules.-39 + 19 = -20-39 + 19 = -20Make fractions improperMake fractions improper
Add fractionsAdd fractions
Write as mixed numberWrite as mixed number
7
16
7
310
Find the sum or difference.Find the sum or difference.
7
43
7
73
7
116
7
)43(73
7
416
Make fractions improperMake fractions improper
Add fractionsAdd fractions
Write as Write as mixed mixed numbernumber
Don’t forget your integer Don’t forget your integer rules. “Opp-Opp”rules. “Opp-Opp”-73 + (-43) = -116-73 + (-43) = -116
Homework Text p. 228, #10-28 evens, 38-44 evensText p. 228, #10-28 evens, 38-44 evens
NJASK7 Prep
