SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 2-a Lesson: S4-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

Multiply 9 x 25

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 5 = 45\$.
Write down 5 and carry over 4 to the tens place.

$1b$

Explanation: Start by multiplying the ones place, i.e., 9 x 5 = 45. Then carry over 4 to the preceding ten’s column and write 5 below the one’s column.

Step: 1c

Now, multiply the number in the tens place by 9,i.e., 9 × 2 = 18 tens.
Finally, add 4(carry over) + 18= 22. Write 22 at the tens place.
Therefore, 9 x 25 = 225.

$1c$

Explanation: In this step, multiply the digit at the tens place by 8. 9 × 2 = 18 tens.Now, 18 + 4(carry over) = 22 tens. Hence, 9 x 25 = 225.