1. \( 68-14 \)

Did you know that simple subtraction has been around since ancient times? The earliest known use dates back to around 3000 BC in ancient Mesopotamia, where they used a base-60 number system. Fast forward to now, and we’re still using these foundational concepts in math every day! When subtracting numbers like \( 68 - 14 \), some common mistakes include forgetting to borrow when subtracting larger numbers or not lining up your digits correctly. To avoid this, always write the numbers one above the other, ensuring proper alignment, and double-check your work by adding your result to the subtracted number to see if you get back to the original!