First/Measurement
Mass and Weight Word Problems
Practice solving word problems about mass and weight measurements. Students work with ounces, pounds, grams, and kilograms in real-world contexts like weighing packages, food, and objects, applying conversion skills to practical weight measurement situations.
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Practice Questions
- A bag of rice weighs 3 kg. How many grams is that?
Show answer
3,000 grams
- A puppy weighs 4 lb 8 oz. How many ounces is that?
Show answer
72 ounces
- Which is heavier: 2 kg of sugar or 2,100 g of flour?
Show answer
2,100 g of flour
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Quick Tip
16 oz = 1 lb | 1,000 g = 1 kg
Teacher Resources
Teaching Notes
Students apply weight knowledge: packages, food, animals. Both customary (oz/lb) and metric (g/kg). Connect to grocery shopping, cooking, science.
Vocabulary
Mass: The amount of matter in an object.
Weight: The force of gravity on an object.
Common Mistakes
- Confusing 16 with other factors
- Mixing metric and customary
- Not identifying units
- Incorrect unit conversions
- Choosing wrong operation
- Confusing mass with weight
- Calculation errors
Differentiation
SupportUse real food packages. Separate metric and customary first. Conversion chart.
ChallengeCompare metric efficiency. Shopping/cooking scenarios with price per weight.
Discussion Questions
- Why do packages show both grams and ounces?
- Which system is easier for weight?
- How do we use mass/weight measurements daily?
- Why is it important to use correct units?
- When might you need to convert units?
- What's the difference between mass and weight?
Extension Activities
- Grocery shopping project
- Weigh and convert various objects
- Compare scales
Parent Tip
Have your child help weigh ingredients for a recipe using a kitchen scale.
Learning Path
Skill Cluster
Measurement and Data
Estimated Time
18 minutes
Skills Practiced
Applied weightWeight problem solvingMetric customary weight