Houghton Mifflin Harcourt
Unit 2 Math Vocabulary Cards (Grade 4)
The 28-page resource contains cards with terms relating to multiplication from inverse operations to front-end estimation to array. Each sheet contains two cards; one with the word and one with the definition.
Math Salamanders Ltd.
Subtraction - Up to 20, Sheet 3
In this finding the differences worksheet, students subtract one-digit and two-digit from numbers to twenty. Students solve 40 problems.
Curated OER
Mental Math Strategies
In this mental math worksheet, students study the detailed instructions and examples for adding or subtracting numbers using "breaking apart" or compensation. Students solve 17 mental math problems.
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
Mental Math: Subtract Tens English Learners 12.1
In this ESL math vocabulary activity, students learn the term "boxes of ten". Students write a word in each of 2 sentences to match the picture. Students also illustrate this sentence: Stars come in boxes of ten.
BBC
Starship English and Math - Online Lesson Plans
Two online lessons, one in math and one in language arts, are here for you. In them, learners play online games which reinforce important skills in literacy and numeracy. The thing I like about both of these lessons is that they get the...
Curated OER
Mental Addition and Subtraction
Students play the online game ArithmAttack to practice mental math skills. They play the game to as many additions or subtractions as possible in sixty seconds. Afterward, they complete a paper based follow up exercise.
Curated OER
Subtraction Sentences, Part 2
Take word problems one step further with apples, dimes, and bricks! After reading the word problems, first graders write out the subtraction sentence and solve the problems. For extra practice, bring in different items and have them...
Curated OER
Explorit's Do-It-In-Your-Head Numbers Quiz
In this mental math activity, students complete a 6 question multiple choice online interactive activity without using pencil, paper or calculator. Included are word problems, multiple operations, averaging, and basic arithmetic.
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
Adding and Subtracting Decimals
The addition and subtraction of decimals is a relatively simple process. The most important thing to remember is to have all of the decimal points lined up. This presentation gives that strategy, plus some others to use when performing...
Curated OER
Arithmetic: Fractions
In this fraction learning exercise, students add and subtract fractions with unlike denominators. They multiply and divide fractions. This one-page learning exercise is designed for mental math. It contains 30 problems, with answers.
Curated OER
Subtraction-There's Got to be An Easier Way!
Third graders observe and demonstrate a variety of problems involving subtraction problems using mental math strategies. They discuss the base ten system and the basic concept of subtraction, and complete a variety of activities...
Curated OER
Math: Mental Math
Young scholars investigate tips for calculating math problems mentally.
Alabama Learning Exchange
Ice Fishing is for the Birds
Approach addition with young mathematicians in an engaging way through this penguin-inspired activity. In small groups, scholars think about times they have used addition in their real lives (there are some suggestions given), then watch...
Curated OER
Adding and Subtracting Decimals
Students practice adding and subtracting numbers with decimals. In this decimals lesson plan, students use grid paper and money to learn how to add and subtract decimals.
Curated OER
Twenty-Five: A Math Card Game
Students calculate addition and subtraction problems using mental math. They add and subtract cards numbered one through nine until a player gets a sum of twenty-five.
Common Core, Inc.
Multi-Digit Whole Number Subtraction
A thorough exploration into subtracting multi-digit numbers, this series of lessons is an excellent way to guide learners of any skill level. With a step-by-step lesson plan and straightforward assessment tools, kids are sure to...
Curated OER
Using Number lines in Addition and Subtraction
Adding and subtracting can be done by counting on or counting down a number line. This presentation provides a complete demonstration and examples of how one can use a number line to solve double-digit addition and subtraction problems....
Curated OER
Mental Division of Whole Numbers
In this mental division activity, students utilize mental arithmetic to answer forty division math problems dealing with whole numbers. Students check their answers online as they go.
Curated OER
Math Vocabulary
In this math vocabulary worksheet, 6th graders match twenty-three math vocabulary words from column A to the definitions in column B.
Curated OER
Mental Multiplication
Students discover how to multiply large numbers in their heads using some simple techniques. They understand that multiplying by 5 is done by multiplying by 10 and cutting the answer in half. They also understand that multiplying by 9...
National Security Agency
Ordering, Adding and Subtracting Integers
Prealgebrarians use colored chips, stickers, and pencils to explore the world of integers. They discover absolute value, compare positive and negative integers, and apply operations to them. A detailed procedure for the three-part...
Curated OER
Addition and Subtraction
In this finding the sums and differences of horizontal problems worksheet, students add and subtract one-digit and two-digit numbers using mental math. Students solve 242 problems.