Page 250 - SK Year 5 Mathematics DLP

2

1 kg GREEN 1 kg
RM8.50 BEANS BARLEY RM7.30

a Calculate the price for 2 kg 400 g of green beans.

2 kg 400 g = 2 kg + 400 g

Step 1 Step 2

1 kg RM8.50 1 000 g RM8.50

2 kg 2 × RM8.50 100 g RM8.50 ÷ 10 = RM0.85
= RM17.00 400 g 4 × RM0.85 = RM3.40

Step 3

2 kg 400 g 2 kg 400 g

RM17.00 + RM3.40 = RM20.40

The price for 2 kg 400 g of green beans is RM20.40.

b Is RM30 enough to buy 4 kg of barley?

Method 1 RM7.30 + RM7.30 + RM7.30 + RM7.30 = RM29.20

1 kg + 1 kg + 1 kg + 1 kg = 4 kg

Method 2 RM7.30 1 kg
2 × RM7.30 = RM14.60 2 × 1 kg = 2 kg
2 × RM14.60 = RM29.20 2 × 2 kg = 4 kg

Yes, RM30 is enough to buy 4 kg of barley.

Find the price for 3 kg 500 g of barley.

242 • Vary questions involving daily life situations such as the relationship
7.3.1
between the volume of petrol and its price.