# Problem Solving

## Bar Model: What’s Ethan’s age?

Ethan is as old as his aunt now. The ratio of Ethan’s age to his aunt’s age was 1 : 7 ten years ago. [...]

## Bar Model: Pears & Mangoes

Ali bought 8 pears and 6 mangoes. A mango costs 4 times as much as a pear. If 2 pears and 1 mango [...]

## Sharing a quarter of a watermelon

Based on the number of watermelons in the diagram shown on the left, how many people can share these watermelons if each were [...]

## Bottle caps as maths manipulatives

There are many items in the rubbish bin which can be used as Maths manipulatives. Why throw them away when children can use them as [...]

## How to develop Fractions Understanding?

This document focus on learning and teaching fractions through the following three processes, with some classroom examples: representing Students of all ages need [...]

## The Heart of Mathematics: An invitation to effective thinking 4th Ed.

The Heart of Mathematics addresses the big ideas of mathematics (many of which are cutting edge research topics) in a non-computational style intended [...]