Maryland Math 4.GR.A.2
The Standard
Use the four operations to solve problems in context involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involving common fractions or decimals, and problems that require expressing measurements given in a larger unit in terms of a smaller unit.
Maryland College and Career Ready Standards for Mathematics (2025) · SOLVE PROBLEMS INVOLVING MEASUREMENT CONVERSION, AREA, AND PERIMETER.
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students solve problems about distance, time, volume, mass, and money using all four operations. They work with fractions and decimals and change larger units into smaller ones when needed.
What Mastery Looks Like
- A student picks an operation that fits the problem and keeps track of units. They can explain that 1.5 hours is 90 minutes and that 1/2 liter is 500 milliliters.
Common Misconceptions
- Students may read 1.5 hours as 1 hour 50 minutes. They may divide instead of multiply when changing liters to milliliters. They may add measurements with different units without converting first.
How to Assess It
- Exit ticket: A 2-liter jug has 0.5 liter poured out. The rest is shared equally among three bottles. How many milliliters go in each bottle?
Lesson moves
Ways to Teach It
Give pairs a 1-liter bottle and 250-milliliter cups; pour out 1/2 liter, then find how many full cups remain.
Ask, 'A trip takes 1.5 hours. Is that 1 hour 50 minutes?' Have students explain with a clock drawing.
Play measurement match with cards showing 2 kg, 2,000 g, 1.5 m, and 150 cm; students pair equal amounts.
Use a mock menu with $2.25 drinks and $3.50 sandwiches; students price two drinks and one sandwich and find change from $10.
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Printable 4.GR.A.2 Worksheet
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Related Standards
- 4.AT.A.4
Solve multistep problems in context involving whole numbers and having whole number answers using the four operations, including problems in which remainders mu...
- 3.GR.A.4
Add, subtract, multiply, or divide to solve one-step problems in measurement contexts involving masses or volumes that are given in the same units.
- 3.AT.A.2
Use the four operations to solve two-step problems in context (within number limits for each operation as stated in 3.NOS.B and 3.NOS.D).
- 5.GR.C.5
Relate volume to the operations of multiplication and addition and solve problems in context.
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