1) The document provides examples for computing mass from situations expressed as fractions, such as computing 180g as 3/4 of 240g. 2) It also gives examples of solving word problems involving computing mass in real contexts, such as determining the total flour in a mixing bowl or the amount of cake served to guests. 3) Key steps involve converting fractions to decimals, adding or subtracting mass amounts, and listing clues to identify the relevant information needed to solve the problem.

1. Learning Outcomes
Compute mass from a situation expressed in fraction
Solve problems in real context involving
computation of mass.

2. Compute mass from a situation expressed in fraction
Example 1:
Points to note
of 240 g
* of = ×
=
= × 240 g
=
=
g
= 180g
Example 2:
*Convert the mixed number into
improper fraction
3
1 of 64 kg
4
7
= 64 kg
4
= ____ kg
4
= kg
NOTES:
Cancellation Method should be emphasize to find the answer
involving multiplication of fraction by the whole number.
25
Example: 3 × 125 g = 3 × 25 g
5 1
= 75 g

3. 2 Solve problem in real context involving computation of
mass
Example 1:
5
Suzan puts kg of flour in a mixing bowl. She added 550 g more flour
8
into the bowl.
What is the total amount of flour , in g , in the bowl?
List the 5
* Mass of flour = kg
clues given 8
• Additional flour = 550 g
Convert
fraction of
kg to g 5× 1000
8
5000 g
=
8
= 625 g
Add both values
Total amount of 625 g
flour + 550 g
1175 g

4. Solve problem in real context involving computation of
mass
Example 2: 2
Puan Siah baked a 3 kg chocolate cake. She cuts of it for her children
5
and the rest was served to her guests. How much cake was served to her
guests?
List the * Mass of a cake = 3 kg
clues given
2
* Children = of 3 kg
5
2
× 3 kg
Convert 5
fraction of
kg
= ________ kg
5
= kg
Find the amount serve
for guests
3. 0 kg
Weight of cake = 3 kg
- 1. 2 kg
Children’s parts = 1.2 kg
Guests’ portions = 3 kg – 1.2 kg 1. 8 kg