Page 204 - SK Year 5 Mathematics DLP

4 No. Number of packets Brand of cat food Mass per unit
1. 100 Meow Meow 1.2 kg
2. 1 000 Comel 0.85 kg

3. 1 000 Anggun 480 g
Based on the table above, calculate the total mass of:

a Meow Meow. b Comel.

100 × 1.2 kg = kg 1 000 × 0.85 kg = g

100 × 1.2 kg = 120 kg 1 000 × 0.85 kg = 850 kg

100 × 1.2 kg = 120 kg = (850 × 1 000) g
= 850 000 g
The total mass of Meow Meow
is 120 kg. 1 000 × 0.85 kg = 850 000 g

The total mass of Comel
is 850 000 g.

Calculate the total mass,
in kg, of Anggun.

1 Calculate.

a 9 × 1.07 kg = kg b 16 × 4.5 g = kg
1
c 24 × 3 kg = g d 50 × 6.78 kg = g
10
2 Quick calculation.
4
a 10 × 2.06 kg = kg b 10 × kg = g
5
1
c 100 × 1.9 kg = g d 100 × 1 kg = g
4
7
e 1 000 × 0.003 kg = g f 1 000 × 3 kg = kg
10

196 • Drill multiplication using flash cards. Encourage pupils to calculate
5.2.4
mentally when multiplying any mass by 10, 100 or 1 000.