PSLE Math Revision: Fractions

• Slice up those pizzas (fractions!) with confidence.
• Add, subtract, multiply, divide — just follow the rules.
• Convert between improper fractions and mixed numbers like a math magician.

🪄 Fraction Tip: Common denominator = happy fractions.

🧩 Remainder

Use this when a fraction of a group is used, and something is left over.

🔍 Example: Mr Toh gave 2/5 of his money to his wife and donated 1/2 of the remainder to charity. If he had $738 left, how much did he give his wife?

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🧩 One Item Constant

One value stays the same while others change.

🔍 Example: Renee baked thrice as many muffins as Emma. Renee sold 50 of her muffins. Then, she had 1/2 as many muffins as Emma. How many muffins did both girls bake?

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🧩 Constant Difference

The difference between two parts stays the same even when quantities change.

🔍 Example: Mr Lim is 50 years old and his grandson is 11 years old. How many years later will Mr Lim’s grandson be 2/5 as old as Mr Lim?

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🧩 Total Constant

The total amount stays the same even though parts are rearranged.

🔍 Example: Siti had 1/3 the number of stickers Jean had at first. After Jean gave 3 of her stickers to Siti, Siti had 3/5 the number of stickers Jean had. How many stickers did Jean have at first?