Red apples, orange candles, yellow stars, green frogs, and blue, indigo, and violet flowers-they all add up to Rainbow Math fun! During this adventure children learn the colors of the rainbow as they practice counting, adding and...

In this exercise, students practice adding two-digit numbers by making tens. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

Divide two whole numbers to get a quotient with a decimal. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

This website explains and defines basic subtraction. There are practice problems at the very end of this lesson.

[Free Registration/Login may be required to access all resource tools.] Add and subtract decimals with and without rounding

Find more than 500 "mental calculation tricks" that will help you square numbers, add, multiply divide, subtract, and find percentages. A great resource for advance math students, gifted children, and teachers wanting to find ideas for...

This website provides students tips on how to add integers using absolute value and by introducing them to a pattern.

This task challenges a student to use place value knowledge and understanding of operations.

[Free Registration/Login may be required to access all resource tools.] In this lesson students find sums of integers by using a number line. Students examine guided notes, review guided practice, watch instructional videos and attempt...

[Free Registration/Login may be required to access all resource tools.] In this lesson students subtract fractions and mixed numbers with like and unlike denominators. Students examine guided notes, review guided practice, watch...

[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.] Estimate differences of fractions and mixed numbers

Use the measuring scales to determine which of the three fruits is heaviest in each question. You may need to add or subtract the weights of other fruits to find out how much each fruit weighs!

In this activity, students learn to count and solve original word problems. They learn to add by combining sets and subtract when removing the set. They use manipulatives to reflect the reasoning used in problem solving.

Subtract small numbers. All answers are less than 5. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Add small numbers. All answers are five or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Students learn the importance of math accuracy and, more specifically, that knowing how to add, subtract, multiply, and divide fractions make life easier for everyone. To help students come to this understanding, they are assigned to a...

[Free Registration/Login may be required to access all resource tools.] This is a video and practice problems demonstrate finding missing numbers using order of operations and working backwards. Operations include addition, subtraction,...

The goal of this lesson is for students to use manipulatives to add integers, creating concepts rather than memorizing rules. This lesson will be related to the 300 Spartans who battled the invading Persians at the Battle of Thermopylae,...

[Free Registration/Login may be required to access all resource tools.] Learn how to add integers.

Practice problems interpreting negative number statements.

Practice taking the absolute value of the difference of two numbers to find the distance between those numbers. Apply this principle to solve word problems. Students receive immediate feedback and have the opportunity to try questions...

In this exercise, students practice subtracting two-digit numbers (no regrouping). Students receive immediate feedback and have the opportunity to watch a tutorial video, get hints, and try questions repeatedly.

Sal adds 53+17 by breaking apart the numbers and making a group of 10. [3:35]