SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 4-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

Multiply 150 by 3

Arrange the numbers vertically.
First, multiply the digit at the one’s place by 3, i.e., 0 × 3 = 0.
Write 0 in the one’s column." in one line."

$1a$

Explanation: In this step, multiply the digit in the one’s place by 3. For instance, if the digit is 0, multiply it by 3, resulting in 0. Write down 0 in the one’s column.

Step: 1b

Now multiply the digit at the ten’s place by 3, i.e., 5 × 3 = 15 tens.
Write 5 in the ten’s place and carry over 1 to the hundred’s place."

$1b$

Explanation: When 5 is multiplied by 3, we get 15. Since 15 is a 2-digit number, write 5 under the ten’s column and carry 1 to the hundred’s column above 1.

Step: 1c

Now, multiply the number in the hundreds place by 3,i.e., 1 × 3 = 3 hundred’s.
Now, 3 + 1 (carry over) = 4. Write 4 at the hundred’s place.
Therefore,150 × 3 = 450.

$1c$

Explanation: When 1 is multiplied by 3, we get 3. Now, we need to add the carry-over 1 to 3, and we get 4. Hence,150 × 3 = 450.