**Primary Standards:**

**MAFS.3.MD.1.2**Measure 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**