Tentu, berikut adalah artikel tentang 0.7 x 78:
What is 0.7 x 78?
0.7 x 78 is a multiplication problem involving a decimal number (0.7) and a whole number (78). To solve this problem, you can use the following steps:
- Ignore the decimal point for now. Multiply 7 and 78, which equals 546.
- Count the decimal places. 0.7 has one decimal place.
- Place the decimal point in the answer. Starting from the rightmost digit of 546, move the decimal point one place to the left. This gives you 54.6.
Therefore, 0.7 x 78 = 54.6.
Understanding the Concept
This multiplication problem demonstrates the concept of multiplying decimals with whole numbers. It involves understanding the concept of place value and how decimal places affect the product.
Key Points to Remember:
- Multiplying a decimal by a whole number results in a decimal number.
- The number of decimal places in the product is the same as the number of decimal places in the decimal factor.
- When multiplying decimals, it is helpful to ignore the decimal point initially and then place it back in the final answer according to the number of decimal places in the original numbers.
Applications of Multiplication with Decimals
Multiplication with decimals is a fundamental operation used in various real-life scenarios, such as:
- Calculating discounts: Finding the price of a product after a discount involves multiplying the original price by the discount percentage (expressed as a decimal).
- Calculating taxes: Calculating the amount of sales tax on a purchase involves multiplying the purchase price by the tax rate (expressed as a decimal).
- Measuring distances and areas: In geometry, multiplication with decimals is used to calculate the area of shapes and the distances between points.
- Converting units: Converting units of measurement often involves multiplying by a decimal factor.
Understanding how to multiply decimals with whole numbers is crucial for solving problems in various fields, including mathematics, science, engineering, and finance.
