Class 4 Maths - ICSE
Numbers
The chapter 'Numbers' for Class 4 ICSE Mathematics builds a strong foundation in working with large numbers up to 10,000 and beyond. Students learn to read, write, compare, and order 4-digit and 5-digit numbers using the Indian Place Value System. They explore place value and face value of digits, expanded notation, and rounding off numbers to the nearest tens, hundreds, and thousands. Mastering these concepts is crucial for performing higher-level arithmetic operations like addition and subtraction, and forms a high-scoring base for ICSE board mathematics assessments.
Start Learning FreeKey Concepts
Indian Place Value System
Numbers are arranged in periods of Ones, Thousands, and Lakhs, where each digit's position determines its place value starting from the right.
Place Value vs Face Value
Face value is the digit itself, while place value is the product of the digit and its position value in the number.
Expanded Form
Writing a number as the sum of the place values of each of its digits, such as 4,523 = 4000 + 500 + 20 + 3.
Comparing and Ordering Numbers
Using symbols like greater than (>), less than (<), and equal to (=) to compare numbers, and arranging them in ascending or descending order.
Rounding Off Numbers
Approximating a number to the nearest tens, hundreds, or thousands by looking at the digit in the immediate lower place.
Important Formulas
Board Exam Info
In ICSE Class 4 Mathematics examinations, the 'Numbers' chapter typically carries around 10 to 15 marks. Common question types include writing number names, finding place values, expanding numbers, filling in missing numbers using comparison symbols (<, >, =), and rounding off numbers.
Frequently Asked Questions
What is the difference between place value and face value?
Face value is the actual digit itself, whereas place value is the value of the digit based on its position in the number.
How do I round off a number to the nearest 10?
Look at the digit in the ones place. If it is 5 or more, round up the tens digit by 1 and put 0 in the ones place. If it is less than 5, keep the tens digit the same and put 0 in the ones place.
How do I find the successor and predecessor of a large number?
To find the successor, add 1 to the given number. To find the predecessor, subtract 1 from the given number.
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