In this addition worksheet, students are shown how to add two 3 digit numbers in your head mentally. There are 18 problems for the students to try to work in their head.

Mental math addition is the focus of this worksheet. Learners apply a strategy outlined in the worksheet to find the sums. In this worksheet, students find the answers for twenty problems. Answers appear at the end.

In this mental math addition worksheet, learners determine sums. In this problem solving worksheet, students write answers to twenty problems.

Some people call them fast facts and some call it recall with automaticity, test your class with this timed basic addition facts worksheet. It includes 7 sections of 8 addition problems each focused on a different set of problems.

In this addition worksheet, students solve 20, 3-digit addition math problems mentally. Students put their answers down on paper, but do not work out the problems on paper.

In this addition worksheet, students solve 2 digit addition problems with regrouping. Students solve 12 addition problems and have a review in the beginning.

In this addition worksheet, students solve the 56 addition problems. They are each in groups of 8 and students record how many seconds it took to get each group done. The problems all involve adding 2 single digit numbers together. The...

In this addition and subtraction worksheet, students solve as many of the 40 addition and subtraction math problems as fast as they can with as much accuracy as they can.

In this two digit addition worksheet, 1st graders double six two digit numbers by writing their answers in the six empty boxes.

In this addition facts worksheet, students practice answering addition problems as quickly as possible using numbers 1-10. An answer key is given.

In this addition worksheet, learners complete two 2-digit addition problems and then write a short story about each. A reference website is included.

Mental math is a wonderful skill for students to hone. In this mental math addition learning exercise, students apply addition fact family strategies to find the sum. Students solve 16 problems.

In this addition worksheet, students add decimals to the hundredths place in 9 problems. There are 8 problems where students add 4.99 and 4 problems adding 9.99. The worksheet works with British currency.

Addition using mental math is the focus of this math worksheet. Students solve two and three-digit number problems, and attempt to do so without the use of pencil and paper. Twenty problems are solved. Answers appear at the end of the...

In this addition worksheet, students, without using a pencil and paper, solve 12 addition problems with 3 single digit numbers each. Students fill in the missing numbers in 4 addition problems.

For this mental addition worksheet, students read the method for adding a series of three 2 digit numbers without paper and pencil. Students solve 16 mental addition problems.

In this addition worksheet, students mentally add together 12 math problems involving addition with 3 numbers. Students fill in the missing numbers in 3 equations.

In this easy addition worksheet, students solve 4 simple picture/numeric problems, circling the correct answer beside each. Teacher notes are included on page 2.

In this addition worksheet, student practice answering sets of "know by heart" problems as quickly as possible A reference website for additional resources is given.

In this mixed number sense instructional activity, 3rd graders are asked to solve 4 problems using multiplication and write the missing digit in 4 numbers for 2 three digit addition problems.

In this two digit addition worksheet, student double two digit numbers and write the answer in the box for 8 two digit numbers.

In this easy addition worksheet, learners complete a total of 5 picture problems with their numeric equivalents written beneath. 

In this addition activity, students use three digit addition and solve for missing addends. Students master 15 problems filling in the missing numerals for each.

In this addition and subtraction worksheet, students solve 40 addition and subtraction math problems as fast as they can and be prepared to explain how they got their answers.