House of Hundreds - II 3 Maths Chapter 9 CBSE Notes 2025-26

The chapter “House of Hundreds – II” helps students understand how to work with numbers in the hundreds, their patterns, and how counting larger numbers looks in real life. It starts with a story about Akbar and Birbal in a garden, where Akbar is curious about the number of crows around. Birbal cleverly guesses and explains his reasoning, teaching us that counting large numbers isn’t always straightforward. This story gently introduces the concept of estimation and makes students think of numbers as part of everyday life.

Understanding Hundreds

The chapter then moves on to the importance of estimating and guessing big numbers. Students are encouraged to think about quantities such as the number of students in their school, people in their neighbourhood, and peanuts in a cart. A key visual aid is the “ginladi” (a garland or train of beads) to represent 1000 and show steps of a hundred at a time, especially after 500—namely 600, 700, 800, 900, and 1000.

To practice representing numbers, children are asked to draw tiles to show quantities like 832, 947, 726, 504, 620, and 700. Locating numbers such as 530, 540, 628, 696, and 590 on a number line builds skill with visualization of where numbers fall between benchmarks like 500 and 1000.

• Finding neighbouring hundreds, fifties, and tens for given numbers reinforces the idea of intervals and position value.
• Sample number lines and grids help in understanding number distribution and identification.

Practicing with Number Grids and Clues

Children are given exercises to write which two hundreds, fifties, and tens surround certain numbers. For example, 468 is between 400 and 500, between 450 and 500, and between 460 and 470. Next, they complete steps on a number line, like moving from 650 to 700 and filling in grids with numbers between 570 and 630. Clues, such as “a number with 4” or “5 less than 625,” help build problem-solving and logical thinking skills using number properties.

Using multiple ways to show the same number—like “68 more than 300,” “400 – 32,” or “3 hundreds, 6 tens, 8 ones” (all equal 368)—shows children that numbers can be broken down and built up in different forms.

Patterns and Number Sequences

Number patterns form an important part of this chapter. Students complete sequences like 940, 941, 942… up to 1000, noticing how one is added at each step. There are also skip-counting patterns with increments like +10, +100, +25, +15, and other variations. This helps children pick out consistent rules and extend patterns further, a foundation for later mathematics.

There are also matching and number puzzle activities:

• Writing number sentences, such as 290 + 110 = 400 or 750 + 25 = 775.
• Choosing the correct number from a list to fit a given range, like matching “number of books in your classroom” with “201–500.”
• Recognizing numbers with special digits, such as “I have two zeroes and am close to 99” (meaning 100).

Number Detective Activities

Fun detective exercises ask children to search for certain kinds of numbers among a list: all numbers ending in hundreds (like 100, 200, …), numbers like 789, 345, or those following a 321 or 876 descending pattern, as well as those where the same digit is repeated (like 333), and palindromic numbers (like 353, which read the same forwards and backwards). These examples help students recognize number properties and patterns in real numbers, making the concept more interesting.

Special focus is placed on numbers containing zeroes, repeated digits, or specific placements of numbers. This enhances the child’s ability to spot features in numbers, supporting both visual and logical reasoning.

Play with Paper Slips

Hands-on activities are suggested using six paper slips, where students can write 100, 10, or 1 on each slip. They try creating the largest and smallest number possible and experiment to see which numbers can or can't be formed (such as 600 with six “100” slips, or 420 with four “100” and two “10” slips). They also try to make numbers like 231 or 123 with suitable combinations, which illustrates place value and combinations in a tactile way.

These exercises reinforce how numbers can be built up with hundreds, tens, and ones, and bring out that some numbers might not be possible with the given slips, leading to extended discussions on number construction.

Creating Numbers with Given Digits

The chapter tasks students with using the digits 3 and 8 to create as many two- and three-digit numbers as possible (such as 38, 83, 33, 88 for two-digit numbers; 338, 388, 833, etc. for three-digit numbers), and arranging them from smallest to largest. This builds understanding about how many variations can result from two digits, and how place value affects the size of numbers.

It also introduces the idea of interpreting numbers represented in word form or with cards—encouraging students to figure out what rules or patterns Teji is following when she says 12 (with blue cards) or 14 (with yellow).

• Learning to recognize patterns and arrange numbers boosts sorting and organizing skills.
• Copying these activities in notebooks further strengthens number sense.

Understanding Bhutasankhya – Word Numbers

Finally, the concept of “Bhutasankhya” or number representation using words is introduced. For example: “Sapta svara” means 7 (seven musical notes), “Palm” or “Sense organs” both mean 5, “Tri kala” means 3, and “Hexagon” means 6. Students are encouraged to think of other words for 0–9 and create their own cards with special meanings for numbers like 15, 27, or 94.

Such activities highlight the diversity of number representation across languages and cultures, promoting creative as well as mathematical thinking. Throughout the chapter, children are motivated to discover relationships among numbers, play with different forms, and use logical reasoning to solve fun puzzles—laying a solid foundation in number sense, patterns, estimation, and creative thinking.

Class 3 Maths Chapter 9 Notes – House of Hundreds II: Quick Revision Points

These Class 3 Maths Chapter 9 Revision Notes make it simple to review all key points from "House of Hundreds II". The notes break down hundreds, skip counting, and number patterns into easy, bite-sized pieces. Each point builds number sense and confidence for exams or classroom quizzes.

Using activities, patterns, and puzzles, these notes help students apply what they learn through practical examples. Easy explanations, clear step-by-step problems, and helpful summaries prepare you for both conceptual understanding and exam scoring in CBSE Class 3 Maths Chapter 9.