Q1. What represents the whole amount in the bar model?
✔ The total number of units drawn represents the whole amount before any parts are taken away.
Q2. If 2 units equal $12, what is the value of 5 units?
✔ One unit is $6. Multiply 5 units by $6 to get the total of $30.
Q3. Where did Siti spend her money in the example?
✔ The problem context specifies Siti ate lunch at a hawker centre in Tampines.
Show transcript
[Slide 1] Visualising Fractions with Bars
Welcome class. Today we solve fraction problems using bar models. Drawing bars helps you see the relationship between parts and wholes clearly.
[Slide 2] The Bar Model Method
First, draw a bar representing the total amount. Divide it into equal parts matching the fraction's denominator. Always label what you know on the diagram.
[Slide 3] Siti at Tampines Hawker Centre
Let us solve this problem about Siti eating lunch. She spent three fifths of her cash at the hawker centre. We draw five equal units to represent her total money.
[Slide 4] Finding the Value of Units
Two units represent the twelve dollars she has left. So one unit is six dollars when we divide. Multiply five units by six to find her original amount.
[Slide 5] Avoiding Common Mistakes
A common error is adding the fractions incorrectly. You must always find the value of a single unit first. Double check your answer against the original question.
[Slide 6] Key Takeaways for PSLE
Remember to draw clear bar models for every problem. Find the value of one unit before calculating totals. Practice this method to ace your PSLE maths.