What is a quick comparison, and how can it help you estimate sums and differences? For this estimation worksheet, learners estimate fractions in addition problems. They complete four problems where they estimate the sums after reviewing...

In this addition instructional activity, students complete 4 magic squares in which the sums of the rows, columns and diagonals must be the same. Students analyze the filled-in squares and calculate the sum or the magic number.

In this sums and differences worksheet, 6th graders solve 20 different problems that including the estimation of numbers in each one. They estimate the sum or difference found in each problem and write it in the space provided. Then,...

This strategy game requires you to select cards with a specified sum before your opponent.

Use the diagram on this one page website to solve the problem. There are teacher notes and the solution is only a click away.

FunBrain's easy addition facts game lets players race cars, fueled by correct answers, around a track.