Find the sum and simplify your answer.

21
8
+
73
4
A.
37
12
B.
57
8
C.
97
8
D.
47
12
That's Correct!
It's Wrong!
2 1
8
+
7 3
4

To add mixed numbers, we first add the whole number parts together, and then the fraction parts.

Add the whole parts.

2 + 7 = 9

Now, add the fraction parts.

1
8
+
3
4

Let’s find the least common multiple of 8 and 4.

Least common multiple of 8 and 4 is 8.

So, least common denominator = 8

Now, rewrite both the fractions with denominator 8.

1
8
×
1
1
=
1
8
3
4
×
2
2
=
6
8

Now, add:

1
8
+
3
4
=
1
8
+
6
8
=
1 + 6
  8
=
7
8

Now, write the sum of whole parts and fraction parts together.

9
7
8
So, the required sum is
9 7
8
.

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Key Data

Questions
10
Grade
5
Theme
Fractions
Passing score
80%

Progress

8 Incorrect
10 Correct
1
2
3
4
5
6
7
8
9
10
Restart