Class 3 Maths - CBSE
House of Hundreds – II
In House of Hundreds – II, Class 3 CBSE students dive deeper into three-digit numbers, building upon the foundations of place value. This chapter teaches children how to read, write, and compare numbers up to 999 using hundreds, tens, and ones blocks. Students learn to expand numbers into standard and expanded forms, skip count in hundreds, and arrange numbers in ascending and descending orders. Mastering this chapter is essential for young learners because it forms the building block for all future arithmetic operations like addition, subtraction, and multiplication with larger numbers, frequently appearing in CBSE formative and summative assessments.
Start Learning FreeKey Concepts
Three-Digit Place Value
Every three-digit number has three positions: Hundreds, Tens, and Ones, starting from the right.
Expanded Form
Writing a number by showing the value of each digit, such as 456 being equal to 400 + 50 + 6.
Comparing Numbers
Comparing numbers by first looking at the hundreds digit, then the tens, and finally the ones digit.
Ascending and Descending Order
Arranging three-digit numbers from smallest to largest (ascending) or largest to smallest (descending).
Skip Counting by Hundreds
Adding 100 repeatedly to count quickly, such as 100, 200, 300, all the way up to 900.
Important Formulas
Board Exam Info
In CBSE Class 3 Mathematics, this chapter typically carries around 6 to 8 marks in school assessments. Common question types include filling in the blanks for missing numbers, writing numbers in expanded form, comparing numbers using symbols like <, >, or =, and arranging a set of three-digit numbers in order.
Frequently Asked Questions
How do I know which three-digit number is bigger?
Always look at the digit in the hundreds place first. The number with the bigger hundreds digit is larger. If the hundreds are the same, check the tens digit!
What is the difference between standard form and expanded form?
Standard form is writing the number normally (like 345), while expanded form shows the sum of its place values (like 300 + 40 + 5).
What comes after 999 in three-digit numbers?
After 999 comes 1000, which is the smallest four-digit number and enters the 'House of Thousands'!
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