Year 3 Exam > Year 3 Notes > Year 3 Mathematics > How to add and subtract in your head
How to add and subtract in your head | Year 3 Mathematics PDF Download
Rounding numbers
Rounding numbers can simplify addition by adjusting numbers to the nearest multiple of 10 or 100.
Here are some examples:
- When adding 9 to a number:
- Step 1: Add 10 to the number.
- Step 2: Subtract 1 from the result to adjust back.
- Example: 36 + 9 = 36 + 10 - 1 = 45
- When adding 18 to a number:
- Step 1: Add 20 to the number.
- Step 2: Subtract 2 from the result to get the final sum.
- Example: 48 + 18 = 48 + 20 - 2 = 66
- When adding 97 to a number:
- Step 1: Add 100 to the number.
- Step 2: Subtract 3 to adjust and find the sum.
- Example: 439 + 97 = 439 + 100 - 3 = 536
- When adding 0.9 to a number:
- Step 1: Add 1 to the number.
- Step 2: Subtract 0.1 from the result to get the final sum.
- Example: 3.7 + 0.9 = 3.7 + 1 - 0.1 = 4.6
Breaking Down Numbers
Breaking down numbers can be a useful strategy to mentally add or subtract numbers.
For instance, let's consider finding the difference between 38 and 63:
- Start by counting from 38 to 40, keeping the difference of 2 in mind.
- Next, count from 40 to 60, which is a difference of 20.
- Finally, count from 60 to 63, which is a difference of 3.
- Add these differences together: 2 + 20 + 3 = 25.
Question for How to add and subtract in your headTry yourself: What is the result of adding 68 to a number using the rounding method described in the text?View Solution
The document How to add and subtract in your head | Year 3 Mathematics is a part of the Year 3 Course Year 3 Mathematics.
All you need of Year 3 at this link: Year 3
|
69 videos|67 docs|11 tests
|
Related Exams
About this Document
|
Nov 17, 2024 Last updated |
Document Description: How to add and subtract in your head for Year 3 2024 is part of Year 3 Mathematics preparation.
The notes and questions for How to add and subtract in your head have been prepared according to the Year 3 exam syllabus. Information about How to add and subtract in your head covers topics
like Rounding numbers, Breaking Down Numbers and How to add and subtract in your head Example, for Year 3 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for How to add and subtract in your head.
Introduction of How to add and subtract in your head in English is available as part of our Year 3 Mathematics
for Year 3 & How to add and subtract in your head in Hindi for Year 3 Mathematics course.
Download more important topics related with notes, lectures and mock test series for Year 3
Exam by signing up for free. Year 3: How to add and subtract in your head | Year 3 Mathematics
Description
Full syllabus notes, lecture & questions for How to add and subtract in your head | Year 3 Mathematics - Year 3 | Plus excerises question with solution to help you revise complete syllabus for Year 3 Mathematics | Best notes, free PDF download
Information about How to add and subtract in your head
In this doc you can find the meaning of How to add and subtract in your head defined & explained in the simplest way possible. Besides explaining types of
How to add and subtract in your head theory, EduRev gives you an ample number of questions to practice How to add and subtract in your head tests, examples and also practice Year 3
tests
|
Explore Courses for Year 3 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Semester Notes
,Objective type Questions
,How to add and subtract in your head | Year 3 Mathematics
,past year papers
,practice quizzes
,Previous Year Questions with Solutions
,How to add and subtract in your head | Year 3 Mathematics
,Summary
,Free
,Exam
,mock tests for examination
,Viva Questions
,study material
,video lectures
,ppt
,Important questions
,MCQs
,How to add and subtract in your head | Year 3 Mathematics
,Extra Questions
,shortcuts and tricks
,Sample Paper
;
Additional Information about How to add and subtract in your head for Year 3 Preparation
How to add and subtract in your head Free PDF Download
The How to add and subtract in your head is an invaluable resource that delves deep into the core of the Year 3 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the How to add and subtract in your head now and kickstart your journey towards success in the Year 3 exam.
Importance of How to add and subtract in your head
The importance of How to add and subtract in your head cannot be overstated, especially for Year 3 aspirants.
This document holds the key to success in the Year 3 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
How to add and subtract in your head Notes
How to add and subtract in your head Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to How to add and subtract in your head.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, How to add and subtract in your head Notes on EduRev are your ultimate resource for success.
How to add and subtract in your head Year 3 Questions
The "How to add and subtract in your head Year 3 Questions" guide is a valuable resource for all aspiring students preparing for the
Year 3 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study How to add and subtract in your head on the App
Students of Year 3 can study How to add and subtract in your head alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the How to add and subtract in your head,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of How to add and subtract in your head is prepared as per the latest Year 3 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup