Subtracting Simple Fractions and Mixed Numbers

1. Subtracting Simple
Fractions and Mixed
Numbers
Prepared by: Genelene B.
Fernandez
Bulihan Elementary School

2. FAMILY FEUD
(Each member
has to give a
fraction or
mixed
number
which will
make the
statement
true)
Name That
Number

3. My sum is 17,
my difference is
1.
My sum is 13,
my difference is
3.
My sum is 12,
my difference is
8
My sum is 50,
my difference is
0.
My sum is 17,
my difference is
13.

4. • In what situation in our lives
do we use subtraction of
fraction and mixed numbers?
• Cite some examples.

5. There were 3 ½ melons left for lunch. At dinner
time the family ate 1 2/3 melons. What part
of the melon was left for the next meal?
• What are the given?
• What is being asked?
• How can we solve the problem?

6. GROUP ACTIVITY

7. • How did you find the activity?
• How did you get the answer?
• Did you work cooperatively with your
team during the activity?

8. To subtract dissimilar fraction:
1. Use LCD to write equivalent fraction.
__ = N , becomes
LCD = 6
__ = N
2. Subtract the numerator and the whole number.
__ =
3
1
2 1
2
3
3
3
6
1
4
6
2
9
6
1
4
6
1
5
6
melons
1
5
6

9. To subtract dissimilar fraction:
1. Change it to improper fraction.
__ = N , becomes
__ = N
2. Find the LCD to make it an equivalent fraction. LCD = 6
__ =
3. Change it to lowest term.
=
3
1
2 1
2
3
7
2
5
3
21
6
10
6
11
6
11
6
1
5
6
melons

10. Subtract. Reduce to lowest term.
(TRIO)
1. _
2. _
3 10
8
1
6
3
3
4
4
2
9
1
1
3
7
1
8
_

11. Solution:
What if after dinner time, they gave ½
of the remaining to a relative who
visited them, how many melons
were left for the next meal?
1
5
6
1
2
1
5
6
3
6
=
= 1
2
6
melons
N

12. A. Rename each mixed number.
1. 5.
2.
3.
4.
7
2
5
= 6
5
3
2
3
= 2
3
6
9
16
= 5
16
4
2
4
= 3
4
5
2
6
= 4
6

13. B. Subtract and reduce to lowest term.
1.
2. 5.
3.
4.
7
15
1
5
=
6
12
2
24
=
6
3
4
6
1
2
=
4
1
2
2
3
4
=
5
2
3
1
5
6
=

14. C. Solve the problems correctly.
1. Roel jogs km while Aries jogs
km, how much less does Roel jog than Aries?
2. The dry ingredients for a pancake recipe is
cups. If there are cups of flour.
How many cups of other ingredients are there?
3
3
4
4
3
5
3
1
7
2
1
2

15. How do we subtract dissimilar fractions with
or without regrouping?
1. Use LCD to write equivalent fractions.
2. Subtract the numerators.
3. Write the difference over the common
denominator.
4. Reduce the answer to lowest term
whenever possible.

16. Subtract. Reduce the answer to
lowest term.
1. _ 4.
2. _ 5.
3.
3
4
5
16
5
6
1
2
9
3
8
4
1
2
_
12
2
5
3
9
10
_
17
1
2
11
4
5
_