Class 1 Mathematics NCERT Solutions: Chapter 5 - Numbers from Ten to Twenty

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NCERT Solutions PDF Class 1 PDF

This chapter focuses on introducing Class 1 students to numbers from ten to twenty. The NCERT Solutions for Chapter 5 of Mathematics provide clear explanations and exercises designed to help young learners understand the concept of grouping by tens. Students will practice making groups of ten and subsequently writing the corresponding numbers. These solutions are crafted to build a strong foundation in number sense, aiding students in recognizing and representing numbers within this range. They are an excellent resource for reinforcing classroom learning and preparing for assessments, ensuring a solid grasp of basic numeracy skills.

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Quick info

BoardCBSE
ClassClass 1
SubjectMathematics
Session2026
LanguageEnglish
TypeNCERT Solutions
ChapterChapter 5

Chapter summary

Chapter 5 of the Class 1 Mathematics NCERT Solutions introduces the concept of numbers from ten to twenty. It focuses on the practical skill of forming groups of ten objects and then representing these quantities using numerals. The exercises guide students to understand place value implicitly by grouping, making the transition from single digits to two-digit numbers intuitive. This chapter is crucial for building foundational number sense.

Learning outcomes

  • Understand the concept of grouping by tens.
  • Learn to represent numbers from 10 to 20.
  • Practice counting and writing numbers in the specified range.
  • Develop basic number sense for two-digit numbers.

Topics covered

Paper topics

  • Numbers from Ten to Twenty
  • Grouping by Tens
  • Counting Objects
  • Writing Numerals
  • Number Sense

Important topics

  • Understanding 'Ten' as a group
  • Representing numbers 10-20
  • Counting and writing sequence

PDF preview

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Questions and Solutions

Q1:

Make a group of Ten.

Figure showing objects to be grouped into tens

Solution:

To make a group of ten, we need to count ten objects together and put them into a group. For example, if we have several objects, we count out ten of them and circle them or place them together to form one group of ten.

Q2:

[Figure showing objects to be grouped into tens]
Solution:

This question likely refers to a figure that shows a collection of objects. The task is to identify and group ten of these objects together. After forming the group of ten, we would then count any remaining objects separately. The answer would involve showing the group of ten and the count of the remaining items.

Q3:

[Figure showing objects to be grouped into tens]
Solution:

Similar to the previous question, this requires looking at a provided figure of objects. The objective is to count and form a group of ten objects from the given collection. The solution would visually represent this grouping and indicate the number of items in the group of ten.

Q4:

[Figure showing objects to be grouped into tens]
Solution:

This question involves a visual representation of objects. The student needs to identify ten objects and make them into a group. The solution would demonstrate how to select ten objects and form a distinct group, possibly by circling them or drawing a box around them.

Q5:

Make a group of 10 and write numbers.

Figure showing objects to be grouped into tens and writing numbers

Ten Ones

Solution:

This exercise asks students to form a group of 10 objects from a given set. After forming the group of ten, they need to write the corresponding number. The phrase 'Ten Ones' signifies that 10 individual units are equivalent to one group of ten. For instance, if the figure shows 12 objects, we would make one group of 10 and then count the remaining 2 objects. The number would be written as 12, representing one group of ten and two ones.

Common mistakes

  • Confusing the order of numbers between 10 and 20.
  • Difficulty in understanding the 'ten' as a group.
  • Errors in writing the numerals for numbers ten to twenty.

Revision tips

  • Use physical objects to form groups of ten, just like in the exercises.
  • Practice writing the numbers from 10 to 20 repeatedly.
  • Ask a parent or teacher to quiz you on number recognition within this range.

Practice MCQs

Q1. What does it mean to make a group of ten?

Q2. If you have one group of ten and three more items, what number do you have?

Q3. Which number comes after 15?

Q4. How many items are there in 'Ten Ones'?

Frequently asked questions

What is the main focus of Class 1 Math Chapter 5?

The main focus is on understanding and representing numbers from ten to twenty, specifically by learning to make groups of ten.

How do these NCERT Solutions help students?

These solutions provide clear, step-by-step guidance to solve problems related to numbers from 10 to 20, reinforcing the concepts taught in the chapter.

What skill does grouping by tens teach?

Grouping by tens helps students understand the concept of place value and how numbers are formed, laying the groundwork for larger numbers.

Are the questions in the solutions the same as in the NCERT book?

Yes, the questions are kept exactly the same as in the NCERT book, ensuring students practice with the original problems.

Important links

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