Round 15.159 to the nearest ten. 

To round 15.159 to the nearest ten, follow these steps:

1. Identify the digit in the tens place (1 in this case).
2. Look at the digit in the ones place (5 in this case).
3. Since the digit in the ones place is 5 or greater, round up the tens place digit by 1.

Thus, 15.159 rounded to the nearest ten is 20.

Supplemental Knowledge

Rounding numbers is an integral arithmetic skill which serves to simplify numbers for easier use. To round a number, take note of which digit is immediately to its right when considering where value you wish to round to; if this digit exceeds 5, round upward; otherwise round downward.
For example:

• Rounding 47 to the nearest ten: The digit in the tens place is 4, and the digit to its right (7) is greater than 5, so we round up to 50.
• Rounding 32 to the nearest ten: The digit in the tens place is 3, and the digit to its right (2) is less than 5, so we round down to 30.

Real-World Applications

Imagine you're planning a budget for a party and estimating costs:

• You have an item priced at 47.89 dollars. To quickly estimate your total expenses without dealing with cents, you might round this amount to 50 dollars.
• Similarly, if another item costs 32.45 dollars, you might round it down to 30 dollars for easier calculation.

Rounding can assist in making quick decisions and simplifying complex calculations in everyday life, thus aiding decision-making quickly and facilitating easier calculations.

Understanding how to round numbers accurately can simplify many aspects of daily life and academic work. If you're looking for more practice or need help with other math concepts,
UpStudy offers a range of calculators designed specifically for different mathematical needs! For arithmetic problems like this one, check out UpStudy’s Decimals Calculator which can help you master rounding and other decimal operations effortlessly.
Explore UpStudy now and take your math skills to new heights!