Class 4 Math: How Heavy How Light Quick Revision Chapter Summary

Need to review the entire chapter before a test? This quick revision guide summarizes all the core concepts, topics, and equations taught in Class 4 How Heavy How Light to help you refresh your memory instantly.

Core Topics At a Glance

### 📌 Weighing balances math Using a balance scale to compare weights, calculating what mass needs to be added to level the scale.

### 📌 Adding kg and grams Adding weights by aligning kilograms and grams separately, carrying over 1000 grams as 1 kilogram.

### 📌 Balance equilibrium equations Algebraic balance problems represented visually, solving for the weight of an unknown object that keeps a scale level.

### 📌 Mass estimation Estimating the weight of everyday objects (e.g. a school bag is about 3 kg, a pencil is about 5 g) in standard units.

Key Formulas Mind Map

• Scale Balance: `Weight_L = Weight_R` - Achieves equilibrium on a balance scale....

Revision Checklist

1. Review the subtopic guides and outline notes.
2. Practice writing the key formulas from memory.
3. Solve at least 3 worked examples and check your steps.
4. Take a timed practice quiz to verify your speed.