SaiBook.us Multiplication

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplications

Grade: 3-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 118 by 8.

Arrange the numbers vertically.
Multiply the digit at the one’s place by 8, i.e., 8 × 8 = 64 = 6 tens + 4 ones.
Write 4 in the one’s place and carry over 6 to the tens column."

$1a$

Explanation: In this step, arrange the numbers according to their places. Multiply the digit in the one’s place by 8, i.e., 8 × 8 = 64. This equals 6 tens and 4 ones. Write 4 in the one’s place and carry over 6 to the tens column.

Step: 1b

Multiply the digit in the tens place by 8, i.e., 8 x 1 = 8. Then, add 6 (carry over) to get 14, and write 4 in the tens place and 1 in the hundreds column.

$1b$

Explanation: In this step, multiply the digit in the tens place by 1, i.e., 8 x 1 = 8. Add 8 (carry over) + 6 = 14, and write 4 in the tens place and 1 in the hundred’s column.

Step: 1c

Finally, multiply the digit at the hundreds place by 8, i.e.,1 × 8 = 8 hundreds.
Add 8 + 1(carry over) = 9. Write 9 at the hundreds place.
Therefore, 118 × 8 is 944.

$1c$

Explanation: Finally, multiply the hundreds digit by 8, i.e., 1 × 8 = 800. Add 8 + 1 (carry over) = 9. Hence, 118 × 8 = 944.