Addition Class 1 Notes Maths Chapter 3

What is Addition? 

An addition is the process of finding the total or sum by combining of two numbers, digits or values. 

• Counting things together is called addition.
• The words total, sum, add, more, in all, altogether etc., mean addition.
• The symbol for addition is +, read as plus.
• The answer we get by adding two numbers is called sum.

Addition by Counting Forward

To add 6 and 3, we start from 6 and count forward by 3 as:
We reach at 9. So, 6 + 3 = 9.

EduRev Tips: It is easy to add if we start from the bigger number while doing addition by counting forward.

How Many Altogether?

Addition of Two Single Digit Number

Horizontal Addition

Adding numbers by writing them in a line (across) is called horizontal addition.

Example 1: 

Example 2:

Vertical Addition

Adding numbers by writing them one below the other (down) is called vertical addition.

Example 1:

Example 2:

Adding 0 to a number

When we add 0 to a number, the sum is the number itself. 

Add and Match

Let's match it:

Writing the Missing Numerals