SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 2-a Lesson: S4-L6

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 x 5

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., \$5 \times 5 = 25\$.
Write down 5 and carry over 2 to the tens place.

$1b$

Explanation: Start by multiplying the ones place, i.e., 5 x 5 = 25. Then carry over 2 to the preceding ten’s column and write 5 below the one’s column.

Step: 1c

Now, multiply the number in the tens place number by 5,i.e., 1 × 5 = 5 tens.
Finally, add 2(carry over) + 5= 7. Write 7 at the tens place.
Therefore,15 x 5 = 75.

$1c$

Explanation: In this step, multiply the digit at the tens place number by 5. 1 × 5 = 5 tens.Now, 5 + 2(carry over) = 7 tens. Hence, 15 x 5 = 75.