Glue this on page 15 of your
math journal
Adding and
Subtracting Mixed
Numbers
Adding Mixed Numbers
Find the sum.
1
+
3
4
9
1. Rewrite the fraction using
LCD if denominators are
different.
1
2. Add or subtract the fractions,
4
9
5
9
then the whole numbers.
3. Simplify if possible.
In this problem, the denominators are the
same, so begin with step 2.
Let’s Do More Examples!
Find the sum.
1
+
3
4
9
1
3
=1
X3
=3
X3
4
4
4
9
3
9
7
+
5
7
= 4
8
X2
1
4
= 5
X2
9
9
9
10
8
1
8
7
8
2
8
= 1
1
8
Add the whole numbers.
Subtracting Mixed
Numbers
Find the Difference.
17
1 17 = 1
20
20
3 X 4 12
=1
- 1
5 X 4 20
5
= 1
20
4
3
X6
18
=
3
4 X 6 24
1
X4
- 1 6
2
14
24
=
X4
=
7
2
12
4
24
7
12
10 7
8
1
4
8
6
6
= 3
4
8
6
3
4
Now You Try!
Find the sum or difference.
3 X2
5
10
6
3
= 3
4
=
12
5 X2
10
6
9
1
9
7
+ 7 10
- 1 12
10
15
5
1
9 =
10
= 1
=
3
10
10 2
12
1
3
11
3
2
4
3
4
EXIT TICKET