SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 2-a Lesson: S4-L5

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 9 x 18

Write the largest number or the multiplicand on the top side and one digit number or the multiplier on the bottom.

$1a$

Explanation: Arrange the numbers vertically.

Step: 1b

Start by multiplying the digit in the one’s place of the bottom number by the digit in the one’s place of the top number,i.e., \$9 \times 8 = 72\$.
Write down 2 and carry over 7 to the tens place.

$1b$

Explanation: Start by multiplying the ones place, i.e., 9 x 8 = 72. Then carry over 7 to the preceding ten’s column and write 2 below the one’s column.

Step: 1c

Now, multiply the number in the tens place number by 9,i.e., 1 × 9 = 9 tens.
Finally, add 7(carry over) + 9= 16. Write 16 at the tens place.
Therefore, 9 x 18 = 162.

$1c$

Explanation: In this step, multiply the digit at the tens place number by 9. 1 × 9 = 9 tens.Now, 9 + 7(carry over) = 16 tens. Hence, 9 x 18 = 162.