Brush up on your math skills relating to the associative property then try some practice problems to test your understanding.
Brush up on your math skills relating to the commutative property then try some practice problems to test your understanding.
This short video and interactive assessment activity is designed to teach second graders about selecting the incorrect subtraction sentence (numbers up to 20).
This course features a video review and an interactive assessment activity for selecting the correct addition sequence. It is aimed at first graders.
This short video and interactive assessment activity is designed to teach second graders about selecting the correct addition sentence.
The CyberSquad tries to rescue the Cyberchase Council, which is being held captive by Hacker in this video segment from Cyberchase.
After completing this tutorial, you'll know what a linear equation is and how to solve one using various arithmetic properties. Contains several definitions, problems with step-by-step solutions, and practice exercises. Includes links to other sites for additional help.
Sal adds two mixed numbers with common (like) denominators. [4:00]
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The purpose of this task is to help students articulate their addition strategies and would be most appropriately used once students have a solid understanding of coin values.
In this game students must engage basic addition and subtraction facts.
It all about money! Explore the concept of money in this real-world, unit plan. A collection of six lessons where students practice skills such as coin identification, mental math, menu math, making change, math operations with coins, and more. Thoroughly written, packed with engaging activities, and complete with printable worksheets. A Canadian money lesson that can be easily adapted for U.S. coins.
This tutorial explains light absorption, reflection and transmission in a clear and concise manner. Provides a "Check Your Understanding" section as well as additional links on color and light.
A guide to support parents as they work with their students in introduction to place value through addition and subtraction within 20.
A guide to support parents as they work with their students in number pairs, addition and subtraction to 10.
A guide to support parents as they work with their students in place value, comparison, addition and subtraction to 100.
A guide to support parents as they work with their students in sums and differences to 10.
A guide to support parents as they work with their students in sums and differences to 20.
The purpose of this task is for students to find different pairs of numbers that sum to 9.
This task requires students to study the make-a-ten strategy that they should already know and use intuitively. In this strategy, knowledge of which sums make a ten, together with some of the properties of addition and subtraction, are used to evaluate sums which are larger than 10.
Making a 10 provides a technique to help students master single digit addition. The task is designed to help students visualize where the 10's are on a single digit addition table and explain why this is so. This knowledge can then be used to help them learn the addition table.