1. **Problem 13:** A dime weighs about $\frac{1}{12}$ ounce. Jody has 1 pound (16 ounces) of dimes. How many dimes does she have? - We need to divide the total weight by the weight of one dime to find the number of dimes. - Formula: Number of dimes = $\frac{\text{Total weight}}{\text{Weight per dime}}$ - Calculation: $\frac{16}{\frac{1}{12}} = 16 \times 12 = 192$ - So, Jody has about 192 dimes. 2. **Problem 14:** Maddie has 180 coins. Of these coins, $\frac{1}{12}$ are dimes. How many dimes does she have? - We need to multiply the total number of coins by the fraction that are dimes. - Formula: Number of dimes = Total coins $\times$ Fraction of dimes - Calculation: $180 \times \frac{1}{12} = 15$ - So, Maddie has about 15 dimes. 3. **Problem 15:** A rectangle has length 3 feet and width $\frac{1}{4}$ foot. What is the area of the rectangle? - We multiply length by width to find the area. - Formula: Area = Length $\times$ Width - Calculation: $3 \times \frac{1}{4} = \frac{3}{4} = 0.75$ - So, the area of the rectangle is 0.75 square feet. **Summary:** - For weight and quantity problems, divide total by unit weight. - For fraction of a total, multiply total by fraction. - For area, multiply length by width.