SaiBook.us Subtraction

Lesson Example Discussion Quiz: Class Homework

Example

Title: Subtraction

Grade: 1-a Lesson: S3-L6

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

Examples:

Subtract 123 - 15

Step 1a

Subtract 123 from 15

Arrange the numbers vertically. Subtract one’s place digits 3 – 5. We have to take borrowing from ten’s place. Here the value is now 13. subtract 13 - 5 = 8. write 8 in one’s column.

$1a$

Explanation: Start subtracting with the digit at one’s place i.e., 3 - 5 We take a borrow from ten’s place since 3 < 5. Here the value is 13. subtract 13 - 5 = 8. write the 8 in one’s column.

Step 1b

Subtract ten’s place digits 1 - 1 = 0. write 0 in ten’s column.

$1b$

Explanation: Move to the ten’s place i.e., 1 - 1 = 0. Write 0 in the ten’s place.

Step 1c

Subtract the hundred’s place digits 1 - 0 = 1. Write 1 in hundred’s column.

$1c$

Explanation: Let’s move to subtract hundred’s place digits 1 - 0 = 1. Write 1 under the hundred’s column.

Step 1d

Thus 123 - 15 = 108.

$1d$

Explanation: Therefore, the difference between the two given numbers is 123 - 15 = 108.