A guided lesson explaining how to add and subtract numbers expressing the answer with the appropriate number of significant digits.

Students will learn from these notes that will challenge their application of the order of operations. Exponents, multiplication, division, addition, and subtraction are featured in these notes.

Students will learn from these notes that will challenge their application of the order of operations. Multiplication, division, addition, and subtraction are featured in these notes.

This CoolMath resource will help students understand the order of operation and MDAS acronym.

This site from the Math Forum of Drexel University contains downloadable sketches and pictures related to vectors. You may need to down-load the Geometer's Sketchpad to view these pages.

[Free Registration/Login Required] Most of the posters on this site are colorful math posters for primary or elementary school. However, there is one math poster that could be used in secondary school geometry class that has the formulas...

Addition and subtraction are covered here, with definitions, tips & tricks, lesson plans, and a section covering typical student questions.

Addition and subtraction are covered here, with definitions, tips & tricks, lesson plans, and a section covering typical student questions.

Addition and subtraction are covered here, with definitions, tips & tricks, lesson plans, and a section covering typical student questions.

Addition and subtraction are covered here, with definitions, tips & tricks, lesson plans, and a section covering typical student questions.

Addition and subtraction are covered here, with definitions, tips & tricks, lesson plans, and a section covering typical student questions.

Sentences and phrases can be formed to help you remember the order of operations.

This lesson should provide examples of how to deal with significant figures when dealing with addition, subtraction, multiplication, and division. It is 4 of 4 in the series titled "Practice Determining Significant Figures."

This picture shows the arithmetic symbols for addition, subtraction, division and multiplication.