I
After going through this lesson, you are expected to add and subtract
simple fractions and mixed number without or with regrouping
Fractions are very important in our day to day living, Whatever we do
daily is just a portion of our tasks or goals on that day. Unconsciously,
you are adding parts of your day to know your finished tasks.
Fractions are similar if they have the same denominator. It is dis-
similar if they have different denominators.
Learning Task 1: Identify similar and dissimilar fractions. On your note
book write S if the fractions are similar and D if dissimilar
223
3
1
and
13
2.
and
4
7
5.
and
47
and
814
4.
20
and
#P
D
When we add/subtract similar fractions, simply add/subtract the
numerators and copy the common
denominator. Then simplify the
resulting fraction if necessary.
When the sum/difference is an improper
fraction, change it to a mixed
number.
Example 1: +
3
I
5
5
Solution:
3
1
+
5
3+1
S
4
7 3
Example 2:
9 9
7-3 4
Solution:
---
To add/subtract dissimilar fractions, change the fraction to similar
fractions using equivalent fraction
.
3
7
Example 1:
+
10
7
Find the equivalent fraction of
with same denominator as
10
3 -
S
6
10
7
Thus
6
7
+
+
10
10
10
Change the improper
647 13
3
fraction
10
10
10
13
10
to mixed
number
PIVOT 4A

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