Question 10 Multiply. Simplify your answer and write as a mixed or whole number. \( 2 \frac{1}{3} \cdot 5 \) \( \square \)
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To multiply \( 2 \frac{1}{3} \) by \( 5 \), we first convert the mixed number into an improper fraction. \( 2 \frac{1}{3} = \frac{7}{3} \). Then we multiply: \[ \frac{7}{3} \cdot 5 = \frac{7 \cdot 5}{3} = \frac{35}{3}. \] Now, convert \( \frac{35}{3} \) into a mixed number. This gives us \( 11 \frac{2}{3} \). So, \[ \boxed{11 \frac{2}{3}}. \] Did you know that multiplication of fractions and mixed numbers dates back to ancient civilizations? The Babylonians had a sophisticated number system over 4,000 years ago, using it for trade and land measurements, much like we do today with our math problems! Also, a common mistake when multiplying fractions is forgetting to convert mixed numbers to improper fractions first. To avoid this pitfall, always check that you’re working with fractions that are easy to multiply before diving into calculations; it saves you time and potential confusion!