SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 3-a Lesson: S2-L7

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 27 by 20.

Arrange the numbers 27 and 20 in columns according to their places.

$1a$

Explanation: In this step, arrange the numbers 27 as the multiplicand and 20 as the multiplier.

Step: 1b

Multiply 0 by each digit of 27:
Start by multiplying 0 by 7, which gives us 0 (0 x 7 = 0). We write 0 in the one’s column.
Then, we multiply 0 by 2 (0 x 2 = 0) and write 0 in the tens place.
Thus, our final answer is 00.

$1b$

Explanation: In this step, to multiply 0 by each digit of 27, we get 00 as the answer.

Step: 1c

Now, we will place a zero (0) under the first partial product, that is, before writing the second partial product in the next line

$1c$

Explanation: In this step, before writing the second partial product in the next line, we will place a zero(0) under the first partial product.

Step: 1d

To find the product of 2 multiplied by each digit of 27, follow these steps.
Multiplying 2 by 7 gives us 14 (2 x 7 = 14). Write 4 in the tens column and carry 1 to the tens place.
Then, we multiply 2 by 2 (2 x 2 = 4) and 4 + carry-over(1) is 5 in the hundreds column.
Our final answer is 540.

$1d$

Explanation: To find the product of 2 multiplied by each digit of 27, multiply 2 by 7 to get 14. Write 4 in the tens column and carry 1 to the tens place. Multiply 2 by 2 to get 4. Add the carry-over from the previous step (1) to 4 to get 5. Write 5 in the hundreds column to get the final answer: 540.

Step: 1e

Add both partial products to get the final product
This means 00 + 540 = 540.
Therefore, the final product is 540.

$1e$

Explanation: Add both results to get a final answer. Now, we need to add 00 + 540 to get 540.