SaiBook.us Addition

Lesson Example Discussion s1 s2 s3 s4 s5 Quiz: Class Homework

Example

Title: Addition

Grade: 3-a Lesson: S1-L4

Explanation: The best way to understand addition is by looking at some examples.Take turns and read each example for easy understanding.

Examples:

Step 1a

Add 678 and 100

Write the numbers one below the other

Pay attention to places of the digits
678 + 100
Add units place
8 + 0 = 0.
Write 0 in one’s column.

$1a$

Explanation: Arrange the number according to their place values.
Start adding from the digits in ones place(8 + 0 = 0).Write 0 in the one’s column.

Step 1b

Now add ten’s place.So,it will be 7 + 0 = 7.
Write 7 in ten’s column.

$1b$

Explanation: Add the digits in the tens column i.e.,(7 + 0). Here the sum is 7.
We can directly write 7 in the ten’s column.

Step 1c

Add hundred’s place. So, it will be 6 + 1 = 7.
Now there is no carryover and we can directly write 7 in the hundredth’s column.

Therefore, the sum of 678 + 100 = 778.

$1c$

Explanation: Now, add the digits in the hundred’s place i.e., 6 + 1 = 7.

Hence, 678 + 100 = 778.