A focused Grade 3 learning session for Liquid Volumes and Masses using visual models, worked examples, strategy guidance, and a short mastery check.
Student goal: I can measure and solve problems involving liquid volume and mass.
Liquid Volumes and Masses means using units, estimates, and operations to solve measurement situations.
Question: Lily measures water in a measuring cup. The cup shows \(500\) mL of water. Which amount equals \(500\) mL?
Why it works: Read directly from the measuring cup: \(500\) mL.
Answer: \(500\) mL
Question: Which bag is heavier?
| Bag | Mass |
|---|---|
| Apples | \(4\) kg |
| Oranges | \(2500\) g |
Answer: The apples (\(4\) kg)
Question: The pitcher shows \(400\) mL of water. Ben adds \(600\) mL more. How much water is in the pitcher now?
Answer: \(1000\) mL
Question: A bottle holds \(2000\) milliliters of juice. A glass holds about \(250\) milliliters. Which is the BEST estimate of how many glasses can be filled from the bottle?
Why it works: Divide: \(2000\div250=8\) glasses.
Answer: \(8\)
Liquid Volumes and Masses becomes easier when students connect the question to a model, use clear steps, and explain why the answer fits.
Understand the model before choosing the operation.
Use scratch paper. The explanation matters more than simply seeing whether the choice is correct.
A bottle holds \(2000\) milliliters of juice. A glass holds about \(250\) milliliters. Which is the BEST estimate of how many glasses can be filled from the bottle?
Answer C: \(8\)
Divide: \(2000\div250=8\) glasses.
Lily measures water in a measuring cup. The cup shows \(500\) mL of water. Which amount equals \(500\) mL?
Answer C: \(500\) mL
Read directly from the measuring cup: \(500\) mL.
A bag of flour has a mass of \(2000\) grams. A block of butter has a mass of \(250\) grams. How many more grams does the flour weigh than the butter?
Answer B: \(1750\) grams
Subtract: \(2000 - 250 = 1750\) g.
Noah has a watering can that holds \(3\) liters. He pours out \(1500\) mL to water the plants. How many milliliters of water are left in the can?
Answer B: \(1500\) mL
\(3\) L \(= 3000\) mL. Subtract: \(3000 - 1500 = 1500\) mL.
Ava fills a measuring cup to the \(600\) mL line with milk. She needs \(900\) mL total. How much more milk does she need to add?
Answer B: \(300\) mL
Subtract the milk already in the cup: \(900 - 600 = 300\) mL needed.
Which bag is heavier?
Answer A: The apples (\(4\) kg)
\(4\) kg \(= 4000\) g, which is more than \(2500\) g.
The pitcher shows \(400\) mL of water. Ben adds \(600\) mL more. How much water is in the pitcher now?
Answer C: \(1000\) mL
Add: \(400 + 600 = 1000\) mL.
A chef estimates the mass of three items before weighing them: an apple (about \(150\) g), a bread roll (about \(80\) g), and a pat of butter (about \(20\) g). Which is the BEST estimate of the total mass?
Answer C: \(250\) g
Estimate: \(150 + 80 + 20 \approx 250\) g. This tests Grade 3 estimation skill.
Mia weighs three items on a scale: Which item has the greatest mass?
Answer A: Apple
\(200\) g is the largest mass.
Eli drinks juice from a bottle. The bottle contained \(1\) liter. After he drinks some, \(300\) mL remains. How much juice did he drink?
Answer C: \(700\) mL
\(1\) L \(= 1000\) mL. Subtract: \(1000 - 300 = 700\) mL drunk.
Which side of the balance scale is heavier?
Answer A: Left side
\(800\) g is more than \(500\) g, so the left side is heavier.
