Class 5 Maths - CBSE

Weight and Capacity

The Class 5 CBSE Mathematics chapter on Weight and Capacity helps students understand standard units of measurement used in daily life. Children learn about grams, kilograms, milligrams for weight, and litres and millilitres for capacity. They master converting between larger and smaller units, such as changing kilograms to grams by multiplying by 1000. Students also practice addition, subtraction, multiplication, and division word problems involving real-life scenarios like buying vegetables or mixing liquids. This chapter is vital for board exams as it tests fundamental arithmetic skills, logical reasoning, and practical application, frequently appearing in 2 to 4 mark word problem sections.

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Key Concepts

Units of Weight

Weight is measured in milligrams (mg), grams (g), and kilograms (kg), where 1 kg equals 1000 g and 1 g equals 1000 mg.

Units of Capacity

Capacity measures the volume of liquids using millilitres (mL) and litres (L), with 1 L equal to 1000 mL.

Conversion of Units

To convert a larger unit to a smaller unit (like kg to g), we multiply by 1000. To convert a smaller unit to a larger unit, we divide by 1000.

Addition and Subtraction of Measurements

We can add or subtract weights and capacities by writing them in column format, ensuring grams are added to grams and kilograms to kilograms.

Multiplication and Division of Measurements

Solving word problems often requires multiplying or dividing a given weight or capacity by a single-digit or double-digit number.

Important Formulas

1 Kilogram (kg) = 1000 Grams (g)
1 Gram (g) = 1000 Milligrams (mg)
1 Litre (L) = 1000 Millilitres (mL)
To convert kg to g: multiply by 1000
To convert L to mL: multiply by 1000

Board Exam Info

In CBSE Class 5 Mathematics assessments, this chapter typically carries about 4 to 6 marks. Common question types include direct unit conversions, filling in the blanks with appropriate units, and 2-step or 3-step word problems based on purchasing groceries, mixing liquids, or calculating total weight.

Frequently Asked Questions

How do I convert kilograms into grams?

To convert kilograms to grams, simply multiply the given value in kilograms by 1000.

Why do we use millilitres instead of litres?

Millilitres are used to measure very small quantities of liquid, such as medicine syrup or ink, whereas litres are used for larger quantities like water in a bucket.

Can we add grams and kilograms directly without conversion?

No, you must convert both quantities into the same unit (either both into grams or both into kilograms) before adding or subtracting them.

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