SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 2-a Lesson: S4-L8

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 18 x 2

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., \$8 \times 2 = 16\$.
Write down 6 and carry over 1 to the tens place.

$1b$

Explanation: Start by multiplying the ones place, i.e., 8 x 2 = 16. Then carry over 1 to the preceding ten’s column and write 6 below the one’s column.

Step: 1c

Now, multiply the number in the tens place number by 2,i.e., 1 × 2 = 2 tens.
Finally, add 1(carry over) + 2= 3. Write 3 at the tens place.
Therefore, 18 x 2 = 36.

$1c$

Explanation: In this step, multiply the digit at the tens place number by 2. 1 × 2 = 2 tens.Now, 1 + 2(carry over) = 3 tens. Hence, 18 x 2 = 36.