In math, units are used to measure and describe quantities. Units can be used to measure length, weight, volume, time, and other attributes of objects and phenomena. For example, the unit of length can be meters (m), the unit of weight can be grams (g), and the unit of time can be seconds (s).

There are different types of units used in math, including:

**Length Units:**Examples include meters (m), centimeters (cm), and kilometers (km).**Weight Units:**Examples include grams (g) and kilograms (kg).**Volume Units:**Examples include milliliters (ml) and liters (l).**Time Units:**Examples include seconds (s), minutes (min), and hours (h).

Converting units involves changing from one unit to another while keeping the same quantity. To convert units, you can use conversion factors, which are ratios that represent the relationship between two different units. For example, to convert 1 meter to centimeters, you can use the conversion factor 1 m = 100 cm.

1. Convert 5 kilometers to meters.

2. Convert 750 grams to kilograms.

3. Convert 3.5 liters to milliliters.

Units are essential in math for measuring and describing quantities. Understanding different types of units and how to convert between them is crucial for solving various math problems.

By mastering the concept of units and their conversions, you can confidently tackle a wide range of math problems involving measurements.

.Study GuideArea and Circumference of Circles Activity LessonArea of Circles Activity LessonCircumference of Circles Worksheet/Answer key

Area and Circumference of Circles Worksheet/Answer key

Area and Circumference of Circles Worksheet/Answer key

Area and Circumference of Circles Worksheet/Answer key

Area and Circumference of Circles

Geometry (NCTM)

Use visualization, spatial reasoning, and geometric modeling to solve problems.

Use geometric models to represent and explain numerical and algebraic relationships.

Measurement (NCTM)

Apply appropriate techniques, tools, and formulas to determine measurements.

Select and apply techniques and tools to accurately find length, area, volume, and angle measures to appropriate levels of precision.

Develop and use formulas to determine the circumference of circles and the area of triangles, parallelograms, trapezoids, and circles and develop strategies to find the area of more-complex shapes.

Connections to the Grade 6 Focal Points (NCTM)

Measurement and Geometry: Problems that involve areas and volumes, calling on students to find areas or volumes from lengths or to find lengths from volumes or areas and lengths, are especially appropriate. These problems extend the students' work in grade 5 on area and volume and provide a context for applying new work with equations.