6.4 adding and subtracting mixed numbers. adding mixed numbers find the sum. 1 4949 + 3 1919...
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6.4 Adding and 6.4 Adding and Subtracting Mixed Subtracting Mixed
NumbersNumbers
6.4 Adding and 6.4 Adding and Subtracting Mixed Subtracting Mixed
NumbersNumbers
Adding Mixed Numbers
Find the sum.1
4
9
+ 31
9
1. Rewrite the fraction using LCD if denominators are different.
2. Add or subtract the fractions,
then the whole numbers.3. Simplify if possible.
45
9 In this problem, the denominators are the same, so begin with step 2.
Let’s Do More Examples!
Find the sum.1
4
9
31
3+ =9
3
X 3
X 3
47
9
47
8
51
4+ =8
2
X 2
X 2
99
8
= 11
8
10
1
8Add the whole numbers.
Subtracting Mixed Numbers
1
Find the Difference.
17
20
- 13
5=
20X 4
X 4 12
5
20= 1
4
33
4
- 1 1
6
=24X 6
X 6 18
14
24
=24X 4
X 4 4
= 7
12
10
7
8
41
8
6
8 = 3
4
-
1
8
2 6
2 7
12
63
4
Now You Try!Find the sum or difference.3
3
5
+ 7 9
10
45
6
- 1 1
12
=10
X 2
X 2 6
10
15
10
= 1 5
10=
1
2
11
1
2
=12
10
9
123 =
3
4
3 3
4