To calculate 69.9 multiplied by 2, we can follow a simple step-by-step process. Multiplication is a basic arithmetic operation that involves adding a number a certain number of times, equal to the multiplier. In this case, we are multiplying 69.9 by 2, which means we are adding 69.9 together twice.
Understanding the Calculation
The calculation of 69.9 multiplied by 2 can be thought of as 69.9 + 69.9. When we add these two numbers together, we are essentially performing the multiplication operation. To do this, we can start by adding the whole numbers and then the decimal parts separately.
Breaking Down the Calculation
First, let’s break down 69.9 into its whole number part (69) and its decimal part (0.9). When we multiply 69 by 2, we get 138. Then, when we multiply 0.9 by 2, we get 1.8. Now, we can add these results together: 138 + 1.8.
| Calculation Step | Result |
|---|---|
| 69 * 2 | 138 |
| 0.9 * 2 | 1.8 |
| 138 + 1.8 | 139.8 |
Final Calculation and Answer
By following the steps outlined above, we find that 69.9 multiplied by 2 equals 139.8. This result comes from adding the whole number part (138) and the decimal part (1.8) of the multiplication results together.
Real-World Application
Understanding how to perform multiplication with decimal numbers, such as calculating 69.9 multiplied by 2, is important in various real-world contexts. For instance, in commerce, when calculating the total cost of items that are priced with decimal points, or in science, when measurements are often in decimal form and need to be scaled up or down.
Furthermore, this basic arithmetic operation is fundamental in more complex mathematical operations and is a building block for understanding algebra, geometry, and other advanced mathematical disciplines. Thus, mastering the multiplication of decimal numbers, including calculations like 69.9 multiplied by 2, is essential for a strong foundation in mathematics and problem-solving skills.
What is the result of multiplying 69.9 by 2?
+The result of multiplying 69.9 by 2 is 139.8. This is calculated by multiplying the whole number part (69) by 2 to get 138, and the decimal part (0.9) by 2 to get 1.8, and then adding these two results together.
Why is understanding decimal multiplication important?
+Understanding decimal multiplication is important because it is used in a variety of real-world applications, including commerce, science, and engineering. It is also a fundamental skill required for more advanced mathematical operations and disciplines.
In conclusion, calculating 69.9 multiplied by 2 is a straightforward process that involves breaking down the number into its whole and decimal parts, multiplying each by 2, and then adding the results together. The final answer to this calculation is 139.8, demonstrating the importance of precise arithmetic operations in everyday and advanced mathematical contexts.
