Problem 3 Find each quotient. \( \begin{array}{l}\text { a. } 5 \div \frac{1}{10} \\ \text { Problem } 4\end{array} \) Use the fact that \( 2 \frac{1}{2} \div \frac{1}{8}=20 \div \frac{3}{10} \)
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To solve \( 5 \div \frac{1}{10} \), remember that dividing by a fraction is the same as multiplying by its reciprocal. This means you can change it to \( 5 \times 10 \). So, \( 5 \div \frac{1}{10} = 5 \times 10 = 50 \). For the second problem, \( 2 \frac{1}{2} \div \frac{1}{8} = 20 \div \frac{3}{10} \), it’s helpful to first convert mixed numbers into improper fractions. Here, \( 2 \frac{1}{2} \) is \( \frac{5}{2} \). Then, when you divide by \( \frac{1}{8} \), it’s actually \( \frac{5}{2} \times 8 = 20 \). Similarly, \( 20 \div \frac{3}{10} \) simplifies to \( 20 \times \frac{10}{3} = \frac{200}{3} \), revealing the beauty of equal values in a fun calculation!