Class 4 Maths - CBSE
Weigh it Pour it
The chapter 'Weigh it Pour it' in Class 4 Mathematics introduces students to the practical measurement of mass (weight) and capacity (volume). Young learners explore standard units such as grams, kilograms, millilitres, and litres. Through engaging real-life examples, students learn how to read weighing scales, understand liquid containers, and perform basic addition and subtraction of measurements. This chapter is vital for CBSE exams as it builds foundational measurement skills, helping students solve word problems related to shopping, cooking, and daily activities, which frequently appear in unit tests and term examinations.
Start Learning FreeKey Concepts
Measuring Mass (Weight)
Mass tells us how heavy an object is. We use grams (g) for lighter things like a pencil and kilograms (kg) for heavier things like a school bag.
Measuring Capacity (Volume)
Capacity tells us how much liquid a container can hold. We use millilitres (ml) for small amounts like medicine and litres (l) for larger amounts like milk or water.
Conversion of Kilograms and Grams
To convert kilograms to grams, we multiply the number of kilograms by 1000 because 1 kg is equal to 1000 grams.
Conversion of Litres and Millilitres
To convert litres to millilitres, we multiply the number of litres by 1000 because 1 litre is equal to 1000 millilitres.
Addition and Subtraction of Weights and Capacities
We can add or subtract measurements by keeping the units same—grams with grams, kilograms with kilograms, millilitres with millilitres, and litres with litres.
Important Formulas
Board Exam Info
In CBSE Class 4 Mathematics, this chapter typically carries around 6 to 8 marks. Common question types include direct conversion between units (like changing kg to g), word problems on adding and subtracting weights of grocery items, and calculating the total volume of liquids.
Frequently Asked Questions
Why do we use grams and kilograms instead of just one unit?
We use grams for very light objects and kilograms for heavy objects so that the numbers we write are easy to read and understand.
How do I remember whether to multiply or divide when converting units?
Remember that larger units (like kg and l) turn into smaller units (like g and ml) by multiplying with 1000, because one big unit contains many small units.
Can I add grams and kilograms directly in a sum?
No, you must convert them so that both numbers have the same unit before adding or subtracting them.
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