Q1. Siti has a cube box with side length 5 cm. What is its volume?
✔ For a cube, multiply side by side by side. Five times five times five equals one hundred and twenty-five.
Q2. Mei Ling buys water at the hawker centre. One bottle holds 2 litres. How many cm cubed is this?
✔ One litre equals one thousand cubic centimetres. So two litres is two times one thousand.
Q3. Ravi's tank is 10 cm long, 5 cm wide and 4 cm high. Find the volume.
✔ Multiply length, width and height together. Ten times five is fifty, then times four equals two hundred.
Show transcript
[Slide 1] Understanding Volume Intuition
Volume tells us how much space a solid object occupies. Imagine filling a shoe box with small sugar cubes. We count the total number of cubes to find volume.
[Slide 2] Formula for Cuboids
To find volume, multiply the three dimensions together. Remember to use cubic units like cm cubed. This formula works for all rectangular boxes.
[Slide 3] Wei Ming's Fish Tank
Wei Ming draws bars for length and width to find base area. He multiplies twenty by ten and then by fifteen. The total volume is three thousand cubic centimetres.
[Slide 4] Watch Your Units
Students often forget to convert units before calculating. Mixing metres and centimetres gives wrong answers. Always change everything to the same unit first.
[Slide 5] Key Points Summary
Remember the formula for cuboids and cubes clearly. Use the bar model to visualise the layers. Practice with real life problems like packing boxes.