Example

Title: Multiplications

Grade: 3-a Lesson: S2-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 15 by 30.

  • Arrange the numbers 15 and 30 in columns according to their places.

1a

.

Explanation: In this step, arrange the numbers 15 as the multiplicand and 30 as the multiplier.

Step: 1b

  • Multiply 0 by each digit of 15:

  • Start by multiplying 0 by 5, which gives us 0 (0 x 5 = 0). We write 0 in the one’s column.

  • Then, we multiply 0 by 1 (0 x 1 = 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 15, 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 3 multiplied by each digit of 15, follow these steps.

  • Multiply 3 by 5 to get 15. Write 5 in the tens column and carry 1 to the tens column.

  • Next, multiply 1 by 3, which is 3 + carry-over(1) = 4. Write 4 in the hundreds column.

  • The final answer is 450.

1d

.

Explanation: To get the product of 3 multiplied by each digit of 15, we can multiply 3 by 5 to get 15. Write 5 in the tens column and carry 1 to the hundreds column. Next, multiply 1 by 3 and add the carry-over (1) to get 4. Write 4 in the hundreds column. The answer is 450.

Step: 1e

  • Add both partial products to get the final product

  • This means 00 + 450 = 450.

  • Therefore, the final product is 450.

1e

.

Explanation: Add both results to get a final answer. Now, we need to add 00 + 450 to get 450.


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