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Lesson Topics Discussion Quiz: Class Homework

Example1

Title: Multiplication

Grade 4+ Lesson s3-l7

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

Examples

Topics → Definition Example1

Multiply 185 by 9.

Step: 1

Arrange the numbers vertically.
First, multiply the digit at the one’s place by 9, i.e., 5 x 9 = 45.
Write 5 in the ones column and carry over 4 to the tens column.

$1a$

Explanation:

In this step, multiply the digit in one’s place by 9. For instance, if the digit is 5, multiply it by 9, resulting in 45. Write down 5 in the ones column and carry over 4 to the tens column.

Step: 2

Next, multiply the digit in the tens place by 9: 8 × 9 = 72. Add the carry: 4 + 72 = 76.
Write down 6 in the tens column and carry over 7 to the hundreds column.

$2a$

Explanation:

In this step, 8 is multiplied by 9, resulting in 72. Add carry over 4 to 72, we get 76. Write 6 in the tens column and carry 7 to the hundreds column.

Step: 3

Now, multiply the digit in the hundreds’ place by 9, i.e., 1 × 9 = 9
Add carry 7 to 9, we get 16. Write 16 in the hundreds’ place.

Thus, the product of 185 and 9 is 1665.

$3a$

Explanation:

In this step, multiply the hundreds digit by 9: 1 x 9 = 9. Then, add 9 to 7 to get 16. Write 16 in the hundreds place, so 185 x 9 = 1665.