NCERT Solutions for Class 4th Maths Chapter 8 Weigh It, Pour It
Updated on 2026-09-19
About this chapter
Heavy things are weighed in kilograms (kg) and light things in grams (g). 1 kg = 1000 g. On a pan balance the heavier pan goes down and the lighter pan goes up. Equal weights keep it level. 500 g is half of 1 kg, 250 g is one-fourth of 1 kg, and ten packets of 100 g make 1 kg. How much a container holds is its capacity. We measure it in litres (l) and millilitres (ml). 1 l = 1000 ml. Two 500 ml, four 250 ml, ten 100 ml or a hundred 10 ml bottles each fill one 1 l bottle. Milk is measured with cans of 50, 100, 200, 500 and 1000 ml. Even one slow drip from a tap wastes litres of water.
- Weigh It, Pour It
- Rita and Shabnam at the market
- Estimating weight
- Packets that make 1 kg
- Balancing a 500 g packet
- Which way will the balance tilt?
- Erasers of 10 g
- Boxes of Sweet
- Weighing Machines / Let Us Do
- Lifting, packing and matching weights
Quick revision
| Idea | Unit we use | Rule to remember | Example from the chapter |
|---|---|---|---|
| Weight of heavy things | kilogram (kg) | 1 kg = 1000 g | A salt packet is 1 kg |
| Weight of light things | gram (g) | 1000 g = 1 kg | One eraser is 10 g |
| Half a kilogram | gram | 500 g = ½ kg | 2 packets of 500 g = 1 kg |
| Quarter kilogram | gram | 250 g = ¼ kg | 4 packets of 250 g = 1 kg |
| Tenth of a kilogram | gram | ten 100 g = 1 kg | 10 packets of 100 g = 1 kg |
| Pan balance | — | The heavier pan goes down | 6 soaps of 200 g beat 1 kg of salt |
| Capacity of big containers | litre (l) | 1 l = 1000 ml | A big water bottle holds 1 l |
| Capacity of small amounts | millilitre (ml) | 1000 ml = 1 l | A dropper holds 1 ml |
| Half a litre | millilitre | 500 ml = ½ l | 2 bottles of 500 ml = 1 l |
| Quarter litre | millilitre | 250 ml = ¼ l | 4 bottles of 250 ml = 1 l |
| A teaspoon | millilitre | 1 teaspoon ≈ 5 ml | 5 droppers of 1 ml fill a teaspoon |
| Milk measuring cans | millilitre | 50, 100, 200, 500, 1000 ml | The 1000 ml can is 1 l |
Exercises
- Weigh It, Pour It — In-text Questions Page 115
- Rita and Shabnam at the market — Fun at Vegetable Market! Page 115
- Estimating weight — Let Us Do Page 116
- Packets that make 1 kg — Let Us Explore Page 116–117
- Balancing a 500 g packet — Let Us Find Page 117
- Which way will the balance tilt? — Let Us Find Page 118
- Erasers of 10 g — Let Us Do Page 119
- Boxes of Sweet — Let Us Think Page 119
- Weighing Machines / Let Us Do — In-text Questions Page 120
- Lifting, packing and matching weights — Let Us Do Page 121
- Litres and millilitres — Measuring Capacity Page 122
- Filling a 1 litre bottle — Let Us Find Page 123–124
- Dosing cups, droppers and everyday liquids — Let Us Do Page 124
- Mr Krishna’s perfumed oil — Let Us Do Page 125
- Items sold in fixed quantities — Let Us Explore Page 125–126
- Water we drink and water we use — Let Us Find Page 126
- Milk measuring cans — Containers Used for Measuring Capacity Page 127
- A dripping tap — Water Conservation in Everyday Life Page 127