Curated OER
Mental Math: Addition and Subtraction
Fourth graders exercise their minds in completing mental math skills of adding and subtracting by making multiplies of ten. They compute problems involving multiplication and division of whole numbers and addition and subtraction of...
Curated OER
More Addition in Your Head pg 1
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...
Curated OER
More and Less
Mental mathematicians add and subtract 1, 10, and 100 from sets of numbers. Each set of one, two and three-digit numbers gives scholars a chance to practice their addition and subtraction skills. There are 62 whole numbers in all. What...
Curated OER
Using Doubles
Bring this easy shortcut to your first grade addition lesson! By adding doubles (6+6, for example), and then adding or subtracting 1, kids learn how to solve simple addition problems with ease. This trick is especially helpful for...
Curated OER
Choose the Operation: Plus or minus (up to 100)
Investigate the relationship between addition and subtraction as scholars fill in these number sentences, each of which is missing a symbol. Is it a subtraction or addition equation? There are 20 of these to start, all written...
DK Publishing
Real-Life Word Problems
Prepare your second graders for word problems with a straightforward review learning exercise. Use it after a unit on addition and subtraction up to 100, or after you have worked on money math. A sample word problem prompts young...
Education Development Center
Thinking Things Through Thoroughly
Problem solving is a skill of its own. Learners use a variety of problems to encourage mental math and logic to get the correct answer. Guiding questions are provided along the way to encourage the right way of thinking to help tackle...
Curated OER
Picture Graphs
An innovative way to practice reading data, as well as the four operations! Three picture graphs prompt first graders to count marbles, books, and pets. They also solve addition and subtraction problems. Additionally, they work on...
Education Development Center
Geography of the Number Line
It's more than just numbers on a line, its an organizational, mental math machine to help learners understand the value of numbers. The tool is handy when introducing positive and negative integers to see their values and relationships....
Curated OER
Rice Cookies Addition
Fourth graders practice adding rice cookies. In this mental math lesson, 4th graders get into groups and call out numbers to each other to add mentally. Students use the rice cookies to show the answer.
abcteach
Simple Integer Addition
Add to your collection of math resources with this skills practice worksheet. Offering dozens of addition problems with sums less than 100, this resource is a simple way to hone the basic skills of young mathematicians.
Curriculum Corner
“I Can” Common Core! 3rd Grade Math
Help third graders make sense of the Common Core math standards with this simple checklist. By rewording each standard as an I can statement, children are provided with clear goals to focus on as they participate in math lessons.
Curated OER
Math: Navigating the World Around Me
Young mathematicians research and discuss real world math word problems and ways in which they apply math concepts in their everyday lives. They create a storyboard of a math word problem from which they create a slide for a multi-media...
Curated OER
Mentally Add 3 Digit Numbers
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.
Curated OER
Mentally Add Larger Numbers
In this addition activity, students solve problems in their heads. In this problem solving activity, students write answers to twenty problems.
Granite School District
Vocabulary Cards 1st Grade M-Z
Clarify key math vocabulary terms with this series of printable cards. Three different versions of each term are provided; one with only the word, one with the word and a picture, and one with the word, a picture, and a definition. Note...
Curated OER
Mental Addition of 3 Numbers pg. 2
Mental math is a wonderful skill for learners to hone. In this mental math addition worksheet, students apply addition fact family strategies to find the sum. Learners solve 16 problems.
Curated OER
Algebra: Addition and Subtraction Equations: Practice
For this addition and subtraction equations worksheet, students use mental math to solve the addition and subtraction equations. Students then answer two test prep questions.
Curated OER
Moving-Math Hopscotch
Students engage in a hopscotch game where each square represents a number. In this mental math and movement lesson, students take turns playing traditional hopscotch, but add a mental math component where they add or subtract specific...
Curated OER
Mentally Add and Subtract 10 or 100
Find the missing digits in these number sequences. Each of the ten has one missing number and scholars must figure out what it is. Here's the pattern: all of these sequences involve counting by 10s. Learners add or subtract 10 to...
Illustrative Mathematics
Building toward fluency
Here is a great learning task that focuses on the development of areas in computational fluency including strategies in mental math. Young learners are guided through a list of addition expressions that help them visually understand the...
Curated OER
Unit 11 Year 5
Apparently unit 11 covers a range of topics related to problem solving, addition, and subtraction. This complete unit presentation is intended for use over a series of days or weeks. It contains numerous visual aids to accompany lessons...
EngageNY
One-Step Equations—Addition and Subtraction
Just one step is all you need to find success in solving equations. The 27th installment in a series of 36 teaches how to solve one-step equations involving addition and subtraction. Tape diagrams help future mathematicians in this task.
Math in English
Skip Counting
Help young mathematicians take the next step toward fluent addition with a simple skip counting exercise.