CCSS.Math.Content.4.MD.A

CCSS.Math.Content.4.MD.A is a cluster heading. These are the individual standards under it.

• CCSS.Math.Content.4.MD.A.1

  Know relative sizes of measurement units within one system of units including km, m, cm; kg, g; lb, oz.; l, ml; hr, min, sec. Within a single system of measurem...

• CCSS.Math.Content.4.MD.A.2

  Use the four operations to solve word problems involving distances, intervals of time, liquid volumes, masses of objects, and money, including problems involvin...

• CCSS.Math.Content.4.MD.A.3

  Apply the area and perimeter formulas for rectangles in real world and mathematical problems.

01

What Students Need to Do

Students convert measurements from larger units to smaller units using multiplication, tables, and labeled equations. They use those conversions to solve problems involving length, time, volume, mass, and money.

02

What Mastery Looks Like

Students choose the correct conversion factor and keep unit labels with each number. They accurately solve one-step and multistep problems and can explain why the converted value is larger or smaller.

03

Common Misconceptions

Students may multiply when they should divide, or use the wrong conversion factor. They may treat time units as base ten or change the measurement without changing the unit label.

04

How to Assess It

Exit ticket: A jug holds 3 liters of juice. After 750 milliliters are poured out, how many milliliters remain? Show your equation.

1. 01

   Give pairs meter sticks and rulers, then have students measure classroom objects and record each length in meters and centimeters.

2. 02

   Ask students to explain why 4 meters becomes 400 centimeters, even though the actual length does not change.

3. 03

   Play a matching game with cards showing equivalent measures, such as 3 kilograms, 3,000 grams, 5 minutes, and 300 seconds.

4. 04

   Have students plan drinks for eight people using 2-liter bottles and 250-milliliter servings, then calculate how many bottles are needed.

• CCSS.Math.Content.3.MD.A

  Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects.

• CCSS.Math.Content.6.RP.A.3d

  Use ratio reasoning to convert measurement units; manipulate and transform units appropriately when multiplying or dividing quantities.

• CCSS.Math.Content.5.MD.A.1

  Convert among different-sized standard measurement units within a given measurement system (e.g., convert 5 cm to 0.05 m), and use these conversions in solving ...