NCERT Class 1 Mathematics Joyful-Mathematics (English): Chapter 5 — Addition
This chapter, 'How Many?' from NCERT Class 1 Mathematics Joyful-Mathematics, introduces basic addition concepts through relatable scenarios. It encourages children to count and combine groups of objects, such as children in a park or ants. The chapter uses visual aids and practical examples to explain the process of addition, focusing on 'aggregation' (combining two groups) and 'augmentation' (adding to an existing group). By engaging with concrete objects, young learners develop an understanding of 'altogether' and the '+' symbol, laying a foundational understanding for mathematical operations essential for CBSE curriculum.
Quick info
| Board | CBSE / NCERT |
|---|---|
| Class | Class 1 |
| Subject | Mathematics |
| Book | Joyful-Mathematics (English) |
| Chapter | Chapter 5 — Addition |
| Language | English |
| PDF type | NCERT Textbook |
| Session | CBSE 2026 |
| Reading time | 2 minutes |
| Word count | 260 |
Learning outcomes
- Understand the concept of counting and combining groups of objects.
- Learn to perform addition using concrete materials.
- Differentiate between aggregation and augmentation in addition.
- Solve simple addition problems with numbers up to 10.
- Develop an understanding of the '+' symbol and its meaning.
Vocabulary
| Word | Meaning |
|---|---|
| altogether | in total; all together |
| addition | the process of adding numbers together |
| aggregation | combining two separate groups to find the total |
| augmentation | adding more objects to an existing group to find the total |
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Practice questions
- 4 children and 2 children altogether make how many children? Write the sum. Answer: 6 children. 4 + 2 = 6
- 3 tops and 1 top altogether make how many tops? Write the sum. Answer: 4 tops. 3 + 1 = 4
- 3 ants and 2 ants altogether make how many ants? Write the sum. Answer: 5 ants. 3 + 2 = 5
- 4 pencils and 3 pencils altogether make how many pencils? Write the sum. Answer: 7 pencils. 4 + 3 = 7
Frequently asked questions
What is the main concept taught in NCERT Class 1 Mathematics Chapter 4?
Chapter 4, 'How Many?', introduces basic addition concepts by teaching children to count and combine groups of objects.
What are aggregation and augmentation in this chapter?
Aggregation is combining two separate groups, while augmentation is adding more objects to an existing group to find the total.
What kind of practice is suggested for children?
Children are encouraged to practice addition with concrete objects, focusing on both aggregation and augmentation.
What is the purpose of the park picture in the chapter?
The park picture is used to engage children in observing and discussing numbers of people and activities, leading into addition concepts.
What mathematical symbol is introduced in this chapter?
The chapter introduces the '+' symbol for addition.
Related resources
Important topics
Topics covered
NCERT Class 1 Mathematics — Joyful-Mathematics (English) — Chapter 5 — Addition. Verified by NCERT Help Editorial Team. Reviewed on 29 Jul 2026. Last updated 10 Aug 2026.