SaiBook.us Subtraction

Lesson Example Discussion Quiz: Class Homework

Example

Title: Subtraction

Grade: 1-a Lesson: S4-L4

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

Examples:

Subtract 140 - 17

Step 1a

Subtract 140 from 17

Arrange the numbers vertically. Subtract one’s place digits 0 – 7. We have to take borrowing from ten’s place. Here the value is now 10. subtract 10 - 7 = 3.write 3 in one’s column.

$1a$

Explanation: Start subtracting with the digit at one’s place i.e., 0 - 7 We take a borrow from ten’s place since 0 < 7. Here the value is 10. subtract 10 - 7 = 3. write the 3 in one’s column.

Step 1b

Subtract ten’s place digits 3 - 1 = 2. write 2 in ten’s column.

$1b$

Explanation: Move to the ten’s place i.e., 3 - 1 = 2. Write 2 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 140 - 17 = 123.

$1d$

Explanation: Therefore, the difference between the two given numbers is 140 - 17 = 123.