Page 201 - SK Year 5 Mathematics DLP

Name Mass
SUBTRACTION OF UNITS OF MASS
Khairul 34.9 kg
Divesh 41.2 kg
1 Calculate the difference in mass Khairul Divesh
between Khairul and Divesh.

41.2 kg – 34.9 kg = kg
10
3 0 12
4 1 . 2 kg
− 3 4 . 9 kg
6 . 3 kg

41.2 kg – 34.9 kg = 6.3 kg

The difference in mass between Khairul and Divesh is 6.3 kg.

2 How much more is the mass of butter than

Butter Cake Recipe the mass of sugar? State the answer in g.
Ingredients A 1 kg – 0.1 kg = g
1 4
• kg of butter
4 Method 1
• 0.1 kg of sugar
1 1 250
• 5 yolks kg – 0.1 kg = ( × 1 000) g – (0.1 × 1 000) g
4 4
• 230 g of 1
wheat flour = 250 g – 100 g

= g
Method 2

0.25 kg 1 kg – 0.1 kg = 0.25 kg – 0.10 kg
4 1.00 kg 4
1 −0 = 0.15 kg
Convert kg
4 1 0 = (0.15 × 1 000) g
to decimal kg − 8
first. 20 = g
− 20
0 Are the answers
for method 1 and
method 2 the same?

The mass of butter is g more than the mass of sugar.

• Carry out activities such as to find the difference in mass between two friends. 193
5.2.3 • Encourage pupils to subtract decimals using vertical form to ensure that the
units are the same and the decimal points are aligned.