SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 2-a Lesson: S3-L4

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

Examples:

Step: 1a

Find the product of 15 x 5

Arrange the numbers is vertically.

$1a$

Explanation: Arrange the numbers in multiplication form.

Step: 1b

First multiply the digit at the ones place by 5.
5 × 5 = 25 = 2 tens + 5 ones

Write 5 in the ones column and carry over 2 to the tens column.

$1b$

Explanation: Multiplication from the extreme right and then work our way to the left. Now, 5 times 5 gives us 25.
we will regroup 25 as 2 tens and 5 ones.So, the 5 stays down in the ones place while the 2 is carried over to the top in the tens place.

Step: 1c

Now multiply the digit at the tens place by 5.
1 × 5 = 5 tens
Now, 2 + 5 (carry over) = 7 tens.

Thus 15 x 5 = 75.

$1c$

Explanation: Now, we move to the next column of tens and multiply 5 by 1 in the tens place. 1 times 5 gives us 5 tens, and along with that, we will add the 2 tens on the top. That gives us 7 tens.

Hence, 15 x 5 = 75.