You would think that humans make up more mass than ants do on this planet, but think again, and this time by performing calculations. Middle schoolers use scientific notation to compute and compare the estimated total mass of all humans...

Great place to sharpen your addition skills. Start with basic facts and go all the way up to 3 digit addition with regrouping. You select the level of difficulty and the number of problems. You can also check your answer right away.

Sharpen your computation skills with two-digit addition, two-digit subtraction, and one-digit multiplication facts using this interactive worksheet. Learners must be familiar with multiplication facts through twelve to be successful....

This interactive worksheet combines all four operations. The focus is on addition and subtraction fact through one hundred and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and...

This interactive worksheet combines all four operations. The focus is on three-digit addition and subtraction and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and would be...

Build your computation skills using this interactive worksheet that focuses on all four operations including three-digit addition and subtraction and basic multiplication and division facts. This is an easy to navigate tool and learners...

Sharpen your mathematical skills with this interactive worksheet that combines two-digit addition, two-digit subtraction, and basic multiplication facts. This activity is easy to grasp and gives learners immediate feedback to their...

Improve your computations skills in all four operations with this timed interactive worksheet. Solve ten problems in five minutes or less. Problems are presented in horizontal format and answers can be checked immediately. This worksheet...

This introductory addition lesson, explores the relationship between adding and number patterns using a number pyramid designed by mathematician Carl Gauss. A short lesson with interesting facts and links to related games for practicing...

Practice several different levels of difficulty of addition problems from single digit all the way up to 3 digit with regrouping. You can also choose single digit addition with negative numbers. When you are finished you can print your...

Review basic addition and subtraction facts using this interactive worksheet. Problems are presented in horizontal format and offer immediate feedback. With only ten problems, this worksheet could also be used for a quick review or short...

This resource provides an interactive worksheet with just ten problems as an independent practice or a quick assessment.

This website for young children gives them practice adding sums to 10. Problems are presented as teddy bears to add up with the corresponding digits that represent the problem symbolically.

On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.

On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.

On this one page website sharpen your logic and addition facts skills while working on this challenge. The solution is available to double check your solution.

Sharpen your logic and addition skills while working on this challenge. Solution.

Improve your computation skills using this timed interactive worksheet.