Second graders solve addition problems without using a calculator. For this addition lesson, 2nd graders solve addition problems by "counting on." Students are taught this specific strategy and given the opportunity to practice.

In this math worksheet, students find the solutions to the problems that involve solving equations with and without rational expressions.

Second graders define the term culture and are exposed to a variety of cultures from around the world. They read books, play Native American games, develop a class book that examines their own culture and, after examining currencies from...

Students use their abilities to recognize coins and their values in this game that focuses on locomotor skills (skip, slide, gallop, run, jump). This game also requires students to add coin values.

Welcome to Zero Sum, a fun math-puzzle game! Drag the tiles over the target numbers to reduce their values to zero. Be careful to make sure that none of the target numbers get reduced below zero. If you get stuck, use the reset button to...

Students examine game theory. Topics include zero-sum games, mixed strategies, and expected value. The tutorial consists of class notes, examples, and practice problems. Review exercises and a chapter quiz are included.

At the end of this tutorial, the learner will understand the difference between zero-sum and win-win perspectives on negotiation. It is 1 of 3 in the series titled "Zero-sum vs. Win-Win Thinking."

A card game where students compete to lay down cards - each containing fractions - which sum to zero. The game provides practice for the students who have a working knowledge of the operations with fractions.

Practice determining whether the sum of two numbers is positive, negative, or zero. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Use Glencoe's randomly generated self-checking quiz to test your knowledge of estimating sums and differences. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...

Determine the sum and difference when adding and subtracting tens and hundreds.

[Free Registration/Login may be required to access all resource tools.] Locate the video "Calculating Sums: Less Than, Greater Than, or Equal to Numbers (Numbers to 1,000)." In this learning module, students must add or subtract to find...

[Free Registration/Login may be required to access all resource tools.] In this learning module, students are presented with a set of numbers up to 100,000, most of which end with one or more zeroes, and must apply their understanding of...

[Free Registration/Login may be required to access all resource tools.] In this learning module, students use the greater than, less than, or equal symbols to complete number sentences with numbers up to 100,000. Includes video...

Estimate the sum and difference by rounding whole numbers and decimals.

The goal of this task is to examine sums and products of rational and irrational numbers. One important property of rational numbers is that their decimals always terminate or repeat: using a slightly different formulation, a rational...

For this task, students are asked to sketch a graph that represents the addition of two other functions. They must first analyze the two graphs presented and complete the problem without any formulas being given. Aligns with F-BF.A.1.b.

In this task, students use the structure of an expression to find ways to rewrite it. They are asked to use the defining property of even and odd functions to manipulate expressions involving function notation and to see the structure in...

In this lesson plan, 1st graders are to use a table of sums to explore the relationship between adding and subtracting.

This task examines the interesting fact that when a number is divisible by 9 then the sum of its digits is also divisible by 9. Aligns with 4.OA.C.5.

This site gives an example of an alternating series whose terms go to zero but whose sum diverges. Can you guess why it diverges? Go to this site to find out why.

This tasks requires students to explore properties of the Cantor Set, which has many uncountable points, no intervals of real numbers, and has length of zero. Aligns with A-SSE.B.4.

At the end of this tutorial, the learner will understand Realistic Conflict Theory as one way of modeling and describing conflict. It is 1 of 3 in the series titled "Realistic Conflict Theory."

The purpose of this task is for students to decompose a number as a sum of two other numbers in more than one way. Students will shake and spill 5 two colored counters and determine how many of each color is showing and record the sum...