Round the number 12.456 to the nearest hundredth.
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The Deep Dive
To round the number 12.456 to the nearest hundredth, look at the third decimal place, which is 6 in this case. Since 6 is greater than 5, you round up the second decimal place (5) by 1. Therefore, 12.456 rounded to the nearest hundredth is 12.46. Here’s a fun fact: The concept of rounding numbers dates back to ancient civilizations where merchants used it for trade to simplify calculations. They often needed to estimate totals quickly, making rounding a practical skill. In real-life applications, rounding is essential, especially in finance. When dealing with money, prices may often need to be rounded to the nearest cent, which is crucial for accurate billing and accounting.