Lesson 15: Practice Problems

Problem 1

Priya’s family exchanged 250 dollars for 4,250 pesos. Priya bought a sweater for 510 pesos. How many dollars did the sweater cost?

pesos

dollars

Problem 2

There are 3,785 milliliters in 1 gallon, and there are 4 quarts in 1 gallon. For each question, explain or show your reasoning.

  1. How many milliliters are in 3 gallons?

  2. How many milliliters are in 1 quart?

Problem 3

Lin knows that there are 4 quarts in a gallon. She wants to convert 6 quarts to gallons, but cannot decide if she should multiply 6 by 4 or divide 6 by 4 to find her answer. What should she do? Explain or show your reasoning. If you get stuck, consider drawing a double number line or using a table.

Problem 4

Tyler has a baseball bat that weighs 28 ounces. Find this weight in kilograms and in grams. (Note: 1 kilogram 35 ounces)

Problem 5 From Unit 2 Lesson 13

Identify whether each unit measures length, volume, or weight (or mass).

  1. Mile

  2. Cup

  3. Pound

  4. Centimeter

  5. Liter

  6. Gram

  7. Pint

  8. Yard

  9. Kilogram

  10. Teaspoon

  11. Milliliter

Problem 6 From Unit 2 Lesson 8

A recipe for trail mix uses 7 ounces of almonds with 5 ounces of raisins. (Almonds and raisins are the only ingredients.) How many ounces of almonds would be in a one-pound bag of this trail mix? Explain or show your reasoning.

Problem 7

An ant can travel at a constant speed of 980 inches every 5 minutes.

  1. How far does the ant travel in 1 minute?

  2. At this rate, how far can the ant travel in 7 minutes?