Students investigate the effects of acid and bases on dyes made with plant materials.  In this chromatography lesson students predict color outcomes and complete a lab activity on color combinations.

For this adding more than two numbers worksheet, learners, working with a partner, calculate the answers to eleven addition equations.

For this relating multiplication and addition worksheet, students, with a partner, problem solve and calculate the answers to ten subtraction and addition equations.

In this mental math reteach worksheet, students review the commutative, associative and distributive properties, then complete a set of 13 problems. A reference web site is given for additional activities.

For this addition and subtraction worksheet, students review the addition properties and the subtraction rules. Students then complete each number sentence and tell which property or rule was used.

In this mental math instructional activity, students use mental math methods to solve problems. Students complete 1 addition, 1 multiplication, and 1 subtraction problem using these methods.

Students demonstrate regrouping in subtraction. In this math computation lesson, students use popsicle sticks to practice the regrouping strategy. Students practice several examples of regrouping problems in small groups.

Students participate in numerous activities and games. In pairs, they play card games to find relationships between a random set of playing cards. After writing samples of Dear Abby letters concerning math problems, students create a...

First graders practice rounding 4 digit numbers using place value concepts. In this estimating sums and differences lesson, 1st graders explore clustering, rounding, and front end estimation as methods for rounding decimals.

In this subtraction worksheet, students subtract one digit numbers from one and two digit numbers with the same 10. Students complete 8 sets of problems.

Fourth graders examine a number of data sets while practicing finding the mean, median, and mode of the numbers.

In this averages and mean worksheet, 4th graders find the average and/or mean of 5 groups of numbers and place their answers on the lines provided.

In this subtracting greater numbers worksheet, students, with a partner, problem solve and calculate the answers to six addition equations.

In this sums with nine worksheet, 1st graders calculate the sums of nine in ten sets of red dots, calculate the answers to twenty five addition equations.

Explains how to add three or more multi-digit numbers.