Primary Standards:

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.

Connecting Standards:

MAFS.3.OA.4.8 Solve 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.

Content Knowledge:

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

• Step 1: Solve word problems involving liquid volume
• Step 2: Solve word problems involving mass