SaiBook.us Decimals

Lesson Example Discussion Quiz: Class Homework

Example

Title: Multiplication of Decimals

Grade: 5-a Lesson: S2-L4

Explanation: The best way to understand decimals is by looking at some examples. Take turns and read each example for easy understanding.

Examples:

Find the product of 251.12 \$\times\$ 300.11.

Step 1a

The given numbers are 251.12 and 300.11.

Multiply the numbers as whole numbers by removing the decimal point.

$1a$

Explanation: In this step, we arrange the numbers. Now ignore the decimal point and multiply the two numbers following the regular multiplication method i.e., \$25112 \times 30011 = 75,36,36,232\$.

Step 1b

After multiplying two numbers, count the total number of decimal places.

The product will have the same number of decimal places.

$1b$

Explanation: In this step, determine the decimal places in each number by counting the digits to the right of the decimal point. For 251.12, there are 2 decimal places, and for 300.11, there are 2 decimal places.

Therefore, the total decimal places are 4. 251.12 × 300.11 = 75363.6232.