MAFS.3.MD.1.2Measure and estimate liquid volumes and masses of objects using standard units of grams (g), kilograms (kg), and liters (l). Add, subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units.
two-step word problems using the four (addition or subtraction) operations. Represent these problems using equations with a letter (symbol) standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.
In this unit, third graders will explore mass and liquid volume, using metric units. Liquid volume, or capacity, refers to the amount of liquid a container can hold. Mass is a measure of how much matter is in an object and is measured by how much an object weighs (at this point). Students will solve one-step word problems related to mass and volume. The problems at this level will involve the same units; converting between units is not included.
Look for connections to Science standard SC.3.P.8.2.
GCG 1 – Learning Goal: As a mathematician, I will be able to understand and estimate units of measure for liquid volume and mass
- Step 1: Understand liquid volumes; measure and estimate using models and standard units
- Step 2: Understand masses of objects; measure and estimate using models and standard units
GCG 2 – Learning Goal: As a mathematician, I will be able to use the four operations to solve one-step word problems involving liquid volume or mass