Maryland Math 3.GR.A.4
The Standard
Add, subtract, multiply, or divide to solve one-step problems in measurement contexts involving masses or volumes that are given in the same units.
Maryland College and Career Ready Standards for Mathematics (2025) · SOLVE PROBLEMS INVOLVING MEASUREMENT AND ESTIMATION OF INTERVALS OF TIME, LIQUID, AND MASSES OF OBJECTS.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students solve one-step problems about mass or liquid volume. They choose addition, subtraction, multiplication, or division when all measurements use the same unit.
What Mastery Looks Like
- Given four bottles holding 200 mL each, a student writes 4 × 200 = 800 and answers 800 mL. They can explain why sharing 800 mL equally among four bottles calls for division.
Common Misconceptions
- Students may add when a problem asks for equal shares, or multiply when it asks how much remains. They may leave off the unit or treat grams and milliliters as interchangeable.
How to Assess It
- Exit ticket: A jug holds 800 mL of juice. Four friends share it equally. How many milliliters does each friend get? Write an equation and label your answer.
Lesson moves
Ways to Teach It
Fill three cups with 200 mL of water each, then find and check the total using a measuring jug.
Ask: A pitcher holds 900 mL, shared equally among three glasses. How much goes in each glass, and why?
Give pairs four problem cards, one per operation, using grams or milliliters; have partners solve, swap, and check answers.
Show a 500 g bag of pasta and ask how many grams remain after using 200 g for dinner.
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Printable 3.GR.A.4 Worksheet
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