SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 3-a Lesson: S1-L4

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

Find the product of 18 x 5

Arrange the numbers in vertically.

$1a$

Explanation: Place the multiplicand 18 on top and multiplier 5 on bottom.

Step: 1b

Multiply the digit in the one’s place, which is 5 in this case, with the multiplicand 8. This will give 8 × 5=40.

$1b$

Explanation: In this step, multiply 8 by 5, to get 40. Place the 0 in one’s column and carry over the 4 to the preceding in the ten’s column.

Step: 1c

Multiplying with the ten’s column digit 1 by 5. This will give 1 × 5 =5.

$1c$

Explanation: In this step, multiply the top ten’s digit, which is 1 by the bottom one digit 5. This will give 1 × 5 =5. Add 5 to the carry-over number 4, (5 + 4=9). We get the answer is 9. Write down the number 9 next to the 0. This way we get the final answer 90.

Step: 1d

The result obtained after multiplication is 18 × 5 =90.

$1d$

Explanation: Thus, the answer is 90, obtained by multiplying 18 with 5.