Q1. Siti travels 120 km in 2 hours. What is her speed?
✔ Speed equals distance divided by time. One hundred twenty divided by two is sixty.
Q2. Wei Ming rides for 30 minutes at 40 km/h. Convert time first.
✔ Divide minutes by sixty to get hours. Thirty divided by sixty equals zero point five.
Q3. Ravi's bar model shows 3 blocks of 20 km. What is total distance?
✔ Multiply the unit value by the number of blocks. Three multiplied by twenty is sixty.
Show transcript
[Slide 1] Understanding Speed in Daily Life
Imagine Siti travelling from Tampines MRT to a hawker centre. Her speed determines how far she goes in one hour. We use this relationship for many PSLE questions.
[Slide 2] The Speed Formula Triangle
Remember the triangle method for easy recall. If you need speed, divide distance by time. This helps solve problems quickly during exams.
[Slide 3] Worked Example with Siti
Siti travels from Tampines MRT to a hawker centre. Her average speed is sixty kilometres per hour. She takes exactly two hours for the trip.
[Slide 4] Using the Bar Model Method
We draw a bar model to visualise the problem. One block represents sixty kilometres per hour. Two blocks show the total distance Siti covered.
[Slide 5] Avoiding Common Unit Mistakes
A common mistake is mixing minutes and hours. You must convert thirty minutes to zero point five hours. This ensures your calculation remains accurate.
[Slide 6] Quick Recap for PSLE
Always check your units match before solving. The bar model helps you see the relationship clearly. Practice these steps to ace your Speed questions.