ADDITION AND SUBTRACTION
OF MIXED NUMBERS
OBJECTIVES:
1. Add and subtract mixed numbers.
2. Solve
routine
and
non-routine
problems involving addition and
subtraction of mixed numbers.
Mixed Number/Fraction
-is a combination of a
whole number and a fraction.
Mang Virgilio harvested 30 kilos of
bananas in his farm. He sold 12 ¾ kilos
of bananas to a nearby store, 11 5/6
kilos of bananas to the market vendor,
and gave the rest to his relatives. How
many kilos of bananas did he give his
relatives?
What is asked?
The number of kilos of bananas
Mang Virgilio gave to his relatives.
What are the given?
Mang Virgilio harvested 30 kilos
of bananas in his farm, 12 ¾ kilos of
bananas sold to a nearby store,
11 5/6 kilos of bananas to the market
vendor
What operation/s is to be used?
Addition and Subtraction
What is the number sentence?
12 ¾ + 11 5/6 = N
30 – N = n
What is the solution?
12 3/4 + 11 5/6
=12 9/12 + 11 10/12
= 23 19/12 or 24 7/12
What is the solution?
30 – 24 7/12 = n
= 29 12/12 – 24 7/12
= 5 5/12
What is the complete answer?
Mang Virgilio gave 5 5/12 kilos
of bananas to his relatives.
How to add or subtract mixed
numbers?
To add or subtract mixed numbers, add
and subtract the whole number parts and the
fraction parts separately. Then, put them
together. Simplify the sum or difference if
necessary.
Example 1:
1 3/5 + 2 1/5 =
=
3 4/5
Example 2:
8 5/6 – 5 2/3
=
3 1/6
Example 3:
10 +16 1/6=
=
26 1/6
Example 4:
35 – 17 2/3
=
17 1/3
TRY THIS!
4 1/5 + 3 2/5
=
7 3/5
TRY THIS!
7 1/3 + 2 2/15
=
9 7/15
TRY THIS!
78 + 6 1/2
=
84 1/2
TRY THIS!
56 – 42 3/4
=13 1/4
TRY THIS!
12 – 9 9/10
=
2 1/10
ASSIGNMENT:
 Do page 20 letter B ONLY
 Do pages 21-22 Quiz and
Apply ONLY