✔ Divide distance by time: 4 divided by 2 equals 2.
Q2. Mei Ling runs 100m in 20s. What is her speed?
✔ Divide distance by time: 100 divided by 20 equals 5.
Q3. Wei Ming travels 60km in 3 hours. What is his speed?
✔ Divide distance by time: 60 divided by 3 equals 20.
Show transcript
[Slide 1] What Is Speed?
Hello class. Speed tells us how far we go in a set time. Imagine travelling from Tampines to the city by MRT.
[Slide 2] The Formula Rule
To find speed, divide total distance by total time. Remember to write units like km/h correctly.
[Slide 3] Worked Example Start
Let us solve a problem involving Siti. She cycles twelve kilometres from her house to school. We need to find her speed in km/h.
[Slide 4] Worked Example Solve
We divide twelve kilometres by two hours using the bar model. Siti cycles six kilometres in one hour. This is her average speed.
[Slide 5] Common Mistake Alert
A common error is mixing minutes with kilometres per hour. Imagine Wei Ming travelling by MRT for thirty minutes. Always convert time to hours first before dividing.
[Slide 6] Lesson Recap
Remember speed is distance over one unit of time. Keep practising with Singapore context questions.