Adding Fractions With Unlike Denominators Worksheet
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1ANSWERS
ADDING FRACTIONS WITH UNLIKE DENOMINATORS
FIND THE LEAST COMMON MULTIPLE
1
5
5
1 X 2 = 2
1 X 5 = 5
X
=
2 X 2 = 4
2 X 5 = 10 **
1
2
2
5
10
3 X 2 = 6
3 X 5 = 15
+
4 X 2 = 8
4 X 5 = 20
2
5
2
2
4
5 X 2 = 10 **
X
=
6 X 2 = 12
5
2
10
** THEY HAVE 10 IN COMMON **
WE NEED TO CHANGE THE DENOMINATORS
(BOTTOM NUMBERS) TO 10 , BUT REMEMBER,
NOW WE CAN ADD
WHAT EVER WE DO TO THE BOTTOM WE
NEED TO DO TO THE TOP!!!
5
4
9
+
=
ANSWER
10
10
10
SEE HOW THEY NOW HAVE
COMMON DENOMINATORS?
SOLVE.
1
1
3
2
1
11
1
2
11
+
=
+
=
+
=
1.
2.
3.
4
2
4
7
2
14
3
5
15
3
1
5
1
4
11
2
3
49
+
=
+
=
+
=
4.
5.
6.
8
4
8
6
9
18
11
8
88
1
3
19
2
3
11
5
5
35
+
=
+
=
+
=
7.
8.
9.
3
10
30
12
4
12
9
12
36
4
2
14
2
2
20
3
1
13
+
=
+
=
+
=
10.
11.
12.
15
3
15
3
7
21
5
20
20
2
5
31
3
1
13
5
3
37
+
=
+
=
+
=
13.
14.
15.
9
24
72
14
4
28
8
10
40
LEVEL 1
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