Second graders examine how to use mental strategies for addition and subtraction. They look at part/whole strategies for multi-digit problems and define which one would be best used for a particular problem. They use tens frames to solve...

In this addition/counting instructional activity, students add a "whole hundred" to another 3-digit number, then add 800 to a set of numbers. Answers are included on page 2.

Students add natural numbers in axioms to prove addition theorems. In this axiom lesson plan, students add 3 + 4 to make the number 7.

In this addition worksheet, 2nd graders add single digit numbers using three addends. Students complete 18 problems for mastery and circle the addend they used first .

In this addition of 2-digit numbers instructional activity, students complete a set of 20 problems, adding three 2-digit numbers together. Answers are included on page 2.

In this adding decimals activity, students add a set of 5 decimal problems, then put missing decimal numbers to make sums add up to the number 1. Answers included, a reference web site is given for additional activities.

In this addition practice worksheet, students solve 75 problems that require them to add 2-digit numbers to 2-digit numbers. The problems require students to regroup.

In this counting worksheet, students complete a set of 5 problems, adding a "whole ten" number to a 3-digit number, then complete 6 additional problems, adding 90 to given numbers.

In this single digit addition worksheet, students complete a total of 15 vertical problems. An answer key and reference web site address are included.

In this addition with regrouping worksheet, students add three digit numbers and one digit numbers together with regrouping. Students complete 30 problems.

In this addition instructional activity, students add two negative numbers between -100 and 100 in 15 problems. They enter and submit the sums online, or print the page as needed.

In this addition instructional activity, students solve 20 problems in which single digit numbers are added. These are basic addition facts in vertical format.

In this addition learning exercise, 2nd graders add pairs of two digit numbers to complete twenty five problems. Answers are included as a second page to this file.

In this addition worksheet, 4th graders add twenty-five double digit numbers together ranging from eleven to forty-eight. Students write their answers on the worksheet.

In this addition worksheet, students solve 20 problems in which two digit numbers are added with and without carrying. There are no examples on the page.

Save some trees and use virtual worksheets. Here are 6 different virtual worksheets that require learners to determine the missing addend. Each page includes 12 problems to solve.

Learners subtract or add a whole number to both sides of the equal sign for fourteen problems. They divide by either two or three to find the value of x. Since this worksheet is online, you can create a new problem set each time you use it!

Examine commutative and associative properties with your class. They'll explore the relationships between addition and subtraction and investigate patterns as they solve addition problems. Links to an assessment and a table game are...

Seventh graders solve problems involving addition of positive and accentuating negative integers. In this adding real numbers lesson, 7th graders draw a number line on chart paper, complete a working sheet and use the Learning Gizmo...

In this addition learning exercise, students fill in the missing addend to an addition problem that adds up to 30. This number could be a one or two digit number. Students complete 41 missing addend problems.

In this finding the sums worksheet, 3rd graders add the numeral nine to two digit numbers using word problems, input forms, and number problems. Students solve 18 problems.

In this addition worksheet, students fill in the missing addend for problems that add up to 100. Students complete 41 problems.

In this finding the sums worksheet, students add four-digit numbers with regrouping. Students solve 20 problems. 

For this music learning exercise, students add up three columns with the totals for the whole, half, and quarter notes. They also add up the values of each pair of notes and then calculate the column totals. No hints or examples are...