SaiBook.us Subtraction

Lesson Example Discussion Quiz: Class Homework

Example

Title: Subtraction

Grade: 3-a Lesson: S1-L8

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

Examples:

Subtract 728 - 86

Step 1a

Subtract 728 - 86

Arrange the numbers vertically. Subtract ones 8 - 6 = 2. Write 2 in ones column.

$1a$

Explanation: Start with the digit at ones place i.e., 8 - 6 = 2. Write 2 in ones column.

Step 1b

Subtract tens and write in the tens place 2 - 8. We have to take the borrowing from hundreds place.Because 2 < 8. Now the digit 12 - 8 = 4. Write 4 in tens column.

$1b$

Explanation: Move to the tens place i.e., 12 - 8 = 4. Write 4 in the tens place.

Step 1c

Subtract the numbers under the hundreds column 6 - 0 = 6. Write 6 in the hundreds column.

$1c$

Explanation: Now subtract hundreds column i.e., 6 - 0 = 6 and write 6 in the hundreds column.

Step 1d

Hence, the difference between the given numbers is 642.

$1d$

Explanation: Thus 728 - 86 = 642.