Page 254 - SK Year 5 Mathematics DLP

3 Every day, Encik Lau drives his car 36 km from home to the office.
He uses 3 of petrol for a one-way journey. What is the distance
travelled, in km, with 40 of petrol?

Solution

Given 3 petrol 36 km

Asked for 40 petrol ? km

36 km ÷ 3 = 12 km (distance for 1 petrol)
Find the distance
travelled with 1
of petrol.

36 km

40 × 12 km = 480 km (distance for 40 petrol)
Let’s check
the answer.
1 2 km
40 4 8 0 km 12 km 1
−4 0
8 0 distance for 3 3 × 12 km = 36 km
− 8 0
0

The distance travelled with 40 of petrol is 480 km.

How many days can Encik Lau use the
40 of petrol for his two-way journey?

246
7.4.1 • Guide pupils to solve problems using the unitary method.