102
UNIT 8
.Word problems involving mass
Example 1 : A dumbbell has a mass of 1 kg 500 g. John increases the mass by
2 kg 750 g. Find the new mass of the dumbbell.
Read and understand the question.
Underline the key details.
A dumbbell has a mass of 1 kg 500 g. John increases the mass by 2 kg 750 g. Find the
new mass of the dumbbell.
What is the question?
Find the new mass of the dumbbell.
Show the relationship. (You can also use a diagram)
What steps are needed?
To add 1 kg 500 g to 2 kg 750 g.
Perform the calculation:
The new mass of the dumbbell is 4 kg 250 g
Check if the answer is correct.
Re-read the question.
Check the representation.
Check the workings.
You may also work backwards.
1 kg 500 g
+ 2 kg 750 g
4 kg 250 g
1
1 kg 500 g 2 kg 750 g
?