Convert Measurements

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Convert Measurements · Grade 4 · Worksheet 3

1. Emma is baking cookies for her school bake sale. She needs to make 3 batches of cookies. Each batch requires 2.5 cups of flour. How many cups of flour does Emma need in total? Answer: 7.5 Solution: Emma needs 3 batches of cookies Each batch requires 2.5 cups of flour Multiply the number of batches by the flour per batch: 3 × 2.5 3 × 2.5 = 7.5 Emma needs 7.5 cups of flour in total.
   Full step-by-step solution

   Step 1: Emma needs 3 batches of cookies Step 2: Each batch requires 2.5 cups of flour Step 3: Multiply the number of batches by the flour per batch: 3 × 2.5 Step 4: 3 × 2.5 = 7.5 Emma needs 7.5 cups of flour in total.

2. Emma is baking cookies for her school bake sale. She needs 2.5 cups of flour for one batch of chocolate chip cookies and 1.75 cups of flour for one batch of oatmeal raisin cookies. If she wants to make 3 batches of chocolate chip cookies and 2 batches of oatmeal raisin cookies, how many total cups of flour will Emma need? Answer: 11 Solution: Calculate the flour needed for the chocolate chip cookies. Emma needs 2.5 cups per batch and is making 3 batches. 2.5 cups/batch × 3 batches = 7.5 cups Calculate the flour needed for the oatmeal raisin cookies.
   Full step-by-step solution

   Step 1: Calculate the flour needed for the chocolate chip cookies. Emma needs 2.5 cups per batch and is making 3 batches. 2.5 cups/batch × 3 batches = 7.5 cups Step 2: Calculate the flour needed for the oatmeal raisin cookies. Emma needs 1.75 cups per batch and is making 2 batches. 1.75 cups/batch × 2 batches = 3.5 cups Step 3: Add the flour needed for both types of cookies to find the total. 7.5 cups + 3.5 cups = 11 cups Emma will need 11 total cups of flour.

3. Emma is helping her dad build a rectangular fence around their backyard garden. The garden is 15 feet long and 10 feet wide. They need to buy a roll of fencing that goes all the way around the garden. How many feet of fencing do they need in total? Answer: 50 feet Solution: The garden is a rectangle with length 15 feet and width 10 feet. A rectangle has two lengths and two widths. Add the two lengths: 15 + 15 = 30 feet.
   Full step-by-step solution

   Step 1: The garden is a rectangle with length 15 feet and width 10 feet. Step 2: A rectangle has two lengths and two widths. Step 3: Add the two lengths: 15 + 15 = 30 feet. Step 4: Add the two widths: 10 + 10 = 20 feet. Step 5: Add the total lengths and widths: 30 + 20 = 50 feet. The answer is 50 feet of fencing.

4. Emma is painting a rectangular mural on her classroom wall. The mural is 15 feet long and 8 feet wide. She wants to outline the entire mural with a gold border. How many feet of gold border does Emma need to buy? Answer: 46 feet Solution: Length = 15 feet Width = 8 feet Perimeter = 2 × (length + width) Perimeter = 2 × (15 + 8) 15 + 8 = 23 Multiply by 2 2 × 23 = 46 The answer is 46 feet.
   Full step-by-step solution

   Step 1: Identify the length and width of the rectangle Length = 15 feet Width = 8 feet Step 2: Use the perimeter formula for a rectangle Perimeter = 2 × (length + width) Step 3: Substitute the values Perimeter = 2 × (15 + 8) Step 4: Calculate inside the parentheses first 15 + 8 = 23 Step 5: Multiply by 2 2 × 23 = 46 Step 6: Include the units The answer is 46 feet.

5. 3.25 × 8 = ? Answer: 26 Solution: Write the multiplication: 3.25 × 8 Multiply 3.25 by 8. First, multiply the whole number part: 3 × 8 = 24 Multiply the decimal part: 0.25 × 8 = 2 Add the two results together: 24 + 2 = 26 The final answer is 26.
   Full step-by-step solution

   Step 1: Write the multiplication: 3.25 × 8 Step 2: Multiply 3.25 by 8. First, multiply the whole number part: 3 × 8 = 24 Step 3: Multiply the decimal part: 0.25 × 8 = 2 Step 4: Add the two results together: 24 + 2 = 26 Step 5: The final answer is 26.