welcome to chapter 3: addition and subtraction!
I have included this page to help with learning and resources in Chapter 3: Addition and Subtraction.
In this unit students will learn about:
In this unit students will learn about:
 How to estimate sums and differences.
 How to add and subtract with 3digit numbers and 4digit numbers in different ways.
 How to create and solve addition and subtraction problems.
 How to communicate about estimation strategies (Nelson Education Limited, 2008)
Helpful Video links 
helpful website links 
The video links below are presented in same order that we learn the material throughout the chapter. Please view from top to bottom to make sure you progress through the content logically. I have included the lesson number to help you.
Introduction to Chapter 3  Counting Studentslesson 3.1  solving problems by estimatinglesson 3.2  estimating sumslesson 3.3  exploring addition and subtractionLesson 3.4  adding from left to right
Lesson 3.5  adding from right to leftLesson 3.6  estimating differenceslesson 3.7  subtracting numbers close to hundreds or thousands 
The links below will take you to various websites where you can learn and practice your skills in Addition and Subtraction.
