Multiplying Decimals Math Example 1
Follow the full solution, then compare it with the other examples linked below.
Example 1
easyCalculate \(0.4 \times 3\).
Solution
- 1 Think of \(0.4\) as \(4 \times 0.1\).
- 2 \(0.4 \times 3 = (4 \times 0.1) \times 3 = 4 \times 3 \times 0.1 = 12 \times 0.1 = 1.2\).
- 3 Or: multiply \(4 \times 3 = 12\), then place decimal: 1 decimal place → \(1.2\).
Answer
1.2
To multiply a decimal by a whole number, multiply as integers then place the decimal point. \(4 \times 3 = 12\), one decimal place → 1.2.
About Multiplying Decimals
Multiplying numbers that contain decimal points by first multiplying as if they were whole numbers, then placing the decimal point in the product based on the total number of decimal places in both factors.
Learn more about Multiplying Decimals →