3/6
+
3/8
=
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Unlike Fractions Addition
Name
Grade
School
Date
Questions10
Score
1
2
8/7
+
3/9
=
3
4/3
+
8/7
=
4
3/5
+
1/2
=
5
10/8
+
4/9
=
6
10/5
+
4/6
=
7
6/8
+
5/9
=
8
8/3
+
7/10
=
9
10/8
+
9/10
=
10
5/4
+
3/8
=
Answers Key
1
3/6
+
3/8
=
7/8
find the LCM for unlike denominators
LCM (6, 8) = 24
36
38
36
36
simplify the above fraction
GCF(21, 24) = 3
2124
36
LCM (6, 8) = 24
36
=
3 x 246 x 24 =
3 x 424 =
122438
=
3 x 248 x 24 =
3 x 324 =
92436
+
38 =
1224 +
924 =
12 + 92436
+
38 =
2124simplify the above fraction
GCF(21, 24) = 3
2124
=
21 ÷ 324 ÷ 3
=
7836
+
38 =
782
8/7
+
3/9
=
31/21
find the LCM for unlike denominators
LCM (7, 9) = 63
87
39
87
87
simplify the above fraction
GCF(93, 63) = 3
9363
87
LCM (7, 9) = 63
87
=
8 x 637 x 63 =
8 x 963 =
726339
=
3 x 639 x 63 =
3 x 763 =
216387
+
39 =
7263 +
2163 =
72 + 216387
+
39 =
9363simplify the above fraction
GCF(93, 63) = 3
9363
=
93 ÷ 363 ÷ 3
=
312187
+
39 =
31213
4/3
+
8/7
=
52/21
find the LCM for unlike denominators
LCM (3, 7) = 21
43
87
43
43
LCM (3, 7) = 21
43
=
4 x 213 x 21 =
4 x 721 =
282187
=
8 x 217 x 21 =
8 x 321 =
242143
+
87 =
2821 +
2421 =
28 + 242143
+
87 =
52214
3/5
+
1/2
=
11/10
find the LCM for unlike denominators
LCM (5, 2) = 10
35
12
35
35
LCM (5, 2) = 10
35
=
3 x 105 x 10 =
3 x 210 =
61012
=
1 x 102 x 10 =
1 x 510 =
51035
+
12 =
610 +
510 =
6 + 51035
+
12 =
11105
10/8
+
4/9
=
61/36
find the LCM for unlike denominators
LCM (8, 9) = 72
108
49
108
108
simplify the above fraction
GCF(122, 72) = 2
12272
108
LCM (8, 9) = 72
108
=
10 x 728 x 72 =
10 x 972 =
907249
=
4 x 729 x 72 =
4 x 872 =
3272108
+
49 =
9072 +
3272 =
90 + 3272108
+
49 =
12272simplify the above fraction
GCF(122, 72) = 2
12272
=
122 ÷ 272 ÷ 2
=
6136108
+
49 =
61366
10/5
+
4/6
=
8/3
find the LCM for unlike denominators
LCM (5, 6) = 30
105
46
105
105
simplify the above fraction
GCF(80, 30) = 10
8030
105
LCM (5, 6) = 30
105
=
10 x 305 x 30 =
10 x 630 =
603046
=
4 x 306 x 30 =
4 x 530 =
2030105
+
46 =
6030 +
2030 =
60 + 2030105
+
46 =
8030simplify the above fraction
GCF(80, 30) = 10
8030
=
80 ÷ 1030 ÷ 10
=
83105
+
46 =
837
6/8
+
5/9
=
47/36
find the LCM for unlike denominators
LCM (8, 9) = 72
68
59
68
68
simplify the above fraction
GCF(94, 72) = 2
9472
68
LCM (8, 9) = 72
68
=
6 x 728 x 72 =
6 x 972 =
547259
=
5 x 729 x 72 =
5 x 872 =
407268
+
59 =
5472 +
4072 =
54 + 407268
+
59 =
9472simplify the above fraction
GCF(94, 72) = 2
9472
=
94 ÷ 272 ÷ 2
=
473668
+
59 =
47368
8/3
+
7/10
=
101/30
find the LCM for unlike denominators
LCM (3, 10) = 30
83
710
83
83
LCM (3, 10) = 30
83
=
8 x 303 x 30 =
8 x 1030 =
8030710
=
7 x 3010 x 30 =
7 x 330 =
213083
+
710 =
8030 +
2130 =
80 + 213083
+
710 =
101309
10/8
+
9/10
=
43/20
find the LCM for unlike denominators
LCM (8, 10) = 40
108
910
108
108
simplify the above fraction
GCF(86, 40) = 2
8640
108
LCM (8, 10) = 40
108
=
10 x 408 x 40 =
10 x 540 =
5040910
=
9 x 4010 x 40 =
9 x 440 =
3640108
+
910 =
5040 +
3640 =
50 + 3640108
+
910 =
8640simplify the above fraction
GCF(86, 40) = 2
8640
=
86 ÷ 240 ÷ 2
=
4320108
+
910 =
432010
5/4
+
3/8
=
13/8
find the LCM for unlike denominators
LCM (4, 8) = 8
54
54
54
LCM (4, 8) = 8
54
=
5 x 84 x 8 =
5 x 28 =
10854
+
38 =
108 +
38 =
10 + 3854
+
38 =
138Adding Unlike Fractions Worksheet
Unlike fractions addition worksheet with answers to practice & learn 6th grade math problems is available online for free in printable & downloadable (pdf & image) format. Tap on PRINT, PDF or IMAGE button to print or download this grade-6 fractions worksheet to practice adding two unlike fractions.
How to Use this Worksheet
In this sixth grade fraction worksheet, students are required to find the sum of fractions with different denominators. For adding fractions with unlike denominators, find the LCD of denominators, multiply LCD with both numerator and denominator of each fraction, simplify the fractions to have equal denominators and add the numerators. The sum of all numerators divided by the common denominator is the sum of two unlike fractions.
Answers KeyTeachers, parents or students can check or validate the solved questions by using the corresponding answers key which comprises the step by step work on how to find the sum of two unlike fractions.
Generate More WorksheetsStudents, teachers or parents can generate unlimited set of questions and answers by using this "NEW WORKSHEET" button to prepare exam, assignments, classwork or homework problems on unlike fractions addition by using LCM or LCD method.
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