Berikut adalah artikel tentang 0.4 x 20:
Multiplying Decimals: 0.4 x 20
This article will explore how to calculate the product of 0.4 and 20.
Understanding the Problem
We are asked to multiply the decimal 0.4 by the whole number 20. This problem involves multiplying decimals and whole numbers.
Methods of Calculation
There are a couple of ways to approach this problem:
1. Converting the decimal to a fraction:
- Step 1: Express 0.4 as a fraction. Since 0.4 represents four-tenths, it can be written as 4/10.
- Step 2: Multiply the fraction by 20. (4/10) x 20 = 80/10.
- Step 3: Simplify the fraction by dividing both numerator and denominator by their greatest common factor, which is 10. 80/10 = 8.
2. Using direct multiplication:
- Step 1: Ignore the decimal point in 0.4 for now and multiply 4 by 20. 4 x 20 = 80.
- Step 2: Count the number of decimal places in the original decimal (0.4 has one decimal place).
- Step 3: Place the decimal point in the result (80) so that it has the same number of decimal places as the original decimal. Therefore, 80 becomes 8.0.
The Answer
Both methods lead to the same answer: 0.4 x 20 = 8.
Conclusion
This article demonstrated how to multiply a decimal and a whole number using two different methods. Understanding these methods will help you confidently solve similar problems involving decimals.
