SaiBook.us Subtraction

Lesson Example Discussion Quiz: Class Homework

Example

Title: Subtraction

Grade: 2-a Lesson: S1-L2

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

Examples:

Step 1a

Subtract 158 from 39

Start subtracting the digits at ones place.
We can see that 9 is greater than 8. So, we will borrow 1 from the tens column which will make it 18. Now, 18 - 9 = 9 ones.

$1a$

Explanation: Arrange the numbers according to their place values.
we can see that 8 is smaller than 9. We can’t subtract 9 from 8.So, we borrow 1 from the tens column and get 18 ones in the ones column. Now, we can easily 18 - 9 = 9.

Step 1b

After giving 1 to the ones column in the previous step, becomes 4.
Now, let us subtract the digits at the tens place 4 - 3 = 1.

$1b$

Explanation: In the next step, we move to subtract the digits at the ten’s place.
Please note that the digit at the ten’s place is now 4 , instead of the 5.
Now,subtract 3 from 4 and hence we get 1 as the answer at the ten’s place.

Step 1c

Now, subtract the digits on the hundreds place, i.e., 1 - 0 = 1. hundreds.

Therefore the difference between the two numbers is:
158 - 39 = 119.

$1c$

Explanation: Now, subtract the digits on the hundreds place, i.e., 1 - 0 = 1. hundreds.

Hence,158 - 39 = 119.