Addition is a fundamental operation in mathematics that involves combining numbers to find their sum. When adding two or more numbers, the result is called the sum. The symbol used to denote addition is +.

To add two or more numbers, line up the numbers vertically according to their place value (ones, tens, hundreds, etc.) and then add the numbers in each column, starting from the rightmost column (ones).

For example, to add 23 and 54:

23 + 54 ____ 77

Sometimes when adding numbers, the sum of a column may be greater than 9. In such cases, the extra value is carried over to the next column on the left.

For example, to add 48 and 57:

48 + 57 _____ 105

**Understand Place Value:**Before adding numbers, make sure you understand the place value of each digit in the numbers.**Line Up Numbers:**When adding multiple numbers, line them up vertically according to their place value.**Add from Right to Left:**Start adding from the rightmost column (ones) and move left, adding each column one at a time.**Carry Over When Necessary:**If the sum of a column is greater than 9, carry over the extra value to the next column on the left.**Practice, Practice, Practice:**The more you practice addition, the more comfortable and confident you'll become with this fundamental operation.

By mastering addition, you'll build a strong foundation for tackling more complex mathematical concepts in the future.

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.