Rounding - Math Third Grade

Rounding Study Guide

1. Understanding Place Value

Before we can round numbers, it's important to understand place value. Each digit in a number has a specific value based on its position.

2. Rounding to the Nearest 10

Rounding to the nearest 10 involves looking at the digit in the ones place and rounding based on the digit in the tens place.

Example: 36 rounded to the nearest 10 is 40 because the digit in the ones place is 6, which is 5 or greater.

3. Rounding to the Nearest 100

Rounding to the nearest 100 involves looking at the digit in the tens place and rounding based on the digit in the hundreds place.

Example: 347 rounded to the nearest 100 is 300 because the digit in the tens place is 4, which is 5 or greater.

4. Rounding to the Nearest 1000

Rounding to the nearest 1000 involves looking at the digit in the hundreds place and rounding based on the digit in the thousands place.

Example: 4,589 rounded to the nearest 1000 is 5,000 because the digit in the hundreds place is 5, which is 5 or greater.

5. Real-World Applications

◂Math Worksheets and Study Guides Third Grade. Solids and Faces

The resources above cover the following skills:

Geometry (NCTM)

Analyze characteristics and properties of two- and three-dimensional geometric shapes and develop mathematical arguments about geometric relationships.

Identify, compare, and analyze attributes of two- and three-dimensional shapes and develop vocabulary to describe the attributes.

Classify two- and three-dimensional shapes according to their properties and develop definitions of classes of shapes such as triangles and pyramids.

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

Recognize geometric ideas and relationships and apply them to other disciplines and to problems that arise in the classroom or in everyday life.