Practice adding and subtracting mixed numbers with common (like) denominators. Some items require regrouping. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice adding and subtracting negative fractions, decimals, and percents. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

You won first place at your school Science Fair and have 2 choices for your prize!! The purpose of this task is for students to compare two options for a prize where the value of one is given $2 at a time, giving them an opportunity to...

Practice adding and subtracting polynomials. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

On this interactive site students practice with basic multiplication skills including counting forward by two's, skip counting to find the total number, and using a number line to solve multiplication problems.

Use these interactive lessons to explore counting forward.

Use these interactive activities to explore multiplication and patterns.

Practice solving more word problems by finding how many more (or fewer) objects there are. Numbers used are 20 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive...

Practice decomposing fractions (breaking fractions into parts that can be added together). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice solving problems like 24 + 45. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

A collection of four worksheet sets that address the Common Core State Standard 2.OA.4.

Practice adding by "putting together" (with numbers less than 10). Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice adding and subtracting using the number line. Numbers used are 100 or less. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice identifying equivalent expressions involving the addition and subtraction of negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice plugging in values to evaluate negative number addition and subtraction expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Practice solving challenging negative number addition and subtraction problems. Number line models, variables, and absolute value come together to push your knowledge of negative numbers even deeper (maybe even below zero!). Students...

Practice making groups of 10 and 100 while adding 3-digit numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice subtraction by using visuals to take numbers apart. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this exercise, students practice subtraction word problems within 10. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.

In this exercise, students practice adding and subtracting on the number line in word problems. Students receive immediate feedback and have the opportunity to watch a video tutorial, get hints, and try questions repeatedly.

Practice rounding whole numbers to the nearest hundred or thousand. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

In this exercise, students practice subtraction within 100. Students receive immediate feedback and have the opportunity to watch a video tutorial, get hints, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2 Fluently add and...

In this exercise, students practice subtraction within 1000. Students receive immediate feedback and have the opportunity to get hints, watch video tutorials, and try questions repeatedly. CCSS.Math.Content.3.NBT.A.2 Fluently add and...

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.