SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 4-a Lesson: S3-L3

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 142 by 4

Arrange the numbers vertically.
First, multiply the digit at the one’s place by 4, i.e., 2 × 4 = 8.
Write 8 in the one’s column.

$1a$

Explanation: In this step, multiply the digit in the one’s place by 4. For instance, if the digit is 2, multiply it by 4, resulting in 8. Write down 8 in the one’s column.

Step: 1b

Now multiply the digit at the ten’s place by 3, i.e., 4 × 4 = 16 tens.
Write 8 in the ten’s place and carry over 1 to the hundred’s place."

$1b$

Explanation: When 4 is multiplied by 4, we get 16. We get 16. Since 16 is a 2-digit number, write 6 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 × 4 = 4 hundred’s. Now, 4 + 1 (carry over) = 5. Write 5 at the hundred’s place. Therefore,142 × 4 = 568.

$1c$

Explanation: When 1 is multiplied by 4, we get 4. Now, we need to add the carry-over 1 to 4, and we get 5. Hence,142 × 4 = 568.