1
Read and write lakh and crore numbers
Read and write large numbers using periods, commas and number names in the Indian system.
Chapter route
Large Numbers Around Us
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2
Convert between numerals and number names
Convert large numerals to number names and number names to numerals accurately.
3
Identify place value in large numbers
Find the place value and face value of digits in numbers up to crores.
4
Read and write million and billion numbers
Read and write large numbers using thousands, millions and billions.
5
Compare Indian and international systems
Relate lakhs/crores with millions/billions and avoid common period-placement errors.
6
Use commas correctly in both systems
Place commas correctly for Indian and international notation.
7
Compare large numbers
Compare large numbers using place value rather than number length alone.
8
Order large numbers
Arrange large numbers in ascending or descending order from real-life data.
9
Find numbers between two large numbers
Identify possible whole numbers that lie between two given large numbers.
10
Round large numbers to useful places
Round numbers to nearest ten, hundred, thousand, lakh or million as required.
11
Estimate sums and differences
Use rounded numbers to estimate totals and differences in practical contexts.
12
Judge reasonableness of large-number answers
Check whether a large-number result is reasonable using estimation.
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