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Lesson Topics Discussion Quiz: Class Homework

Example1

Title: Multiplication

Grade 4+ Lesson s3-l5

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 168 by 5.

Step: 1

Arrange the numbers vertically.
First, multiply the digit at the one’s place by 5, i.e., 8 x 5 =40.
Write 0 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 4. For instance, if the digit is 8, multiply it by 5, resulting in 40. Write down 0 in the one’s column and carry over 4 to the tens column.

Step: 2

Next, multiply the digit in the tens place by 5: 5 × 6 = 30. Add the carry: 4 + 30 = 34.
Write down 4 in the tens column and carry over 3 to the hundreds column.

$2a$

Explanation:

In this step, 5 is multiplied by 6, resulting in 30. Add carryover 4 to 30, we get 34. Write 4 in the tens column and carry 3 to the hundreds column.

Step: 3

Now, multiply the digit in the hundreds’ place by 5, i.e., 1 × 5 = 5
Add carry 3 to 5, we get 8. Write 8 in the hundreds’ place.

Thus, the product of 168 and 5 is 840.

$3a$

Explanation:

In this step, multiply 3 by the hundreds digit, which is 1: 1 x 5 = 5. Then, add 3 to 5 to get 8. Write 8 in the hundreds place, so 168 x 5 = 840.