CK-12 Foundation
Ck 12: Arithmetic: Estimation of Sums of Mixed Numbers and Fractions
[Free Registration/Login may be required to access all resource tools.] Estimate sums of fractions and mixed numbers
CK-12 Foundation
Ck 12: Elem Math: Calculating Sums Numbers Up to 100000
[Free Registration/Login may be required to access all resource tools.] Students use place value to practice with addition skills.
National Council of Teachers of Mathematics
Nctm: Figure This: Which Is Worth More, a Smile or a Frown?
Solve for the value of the smiles and frowns to find out how much a smile is worth, in this activity. A challenge that focuses on number sense, number combinations, and unknowns. Included are examples of how this skill is applied in real...
Other
Ministerio De Educacion: Suma Y Resta
Practice your mental math by finding two numbers knowing their sum and difference.
ICT Games
Ict Games: Shark Numbers
Shark Numbers is a mobile-friendly place value game. The learning objective of this game is to know what each digit in a 3-digit number represents, (for ages 5-8).
Math Slice
Math Slice: Math Jeopardy Game
Let's play Jeopardy! Modeled after the popular TV game show, this interactive game focuses on addition number skills. Immediate feedback given to responses. Top winners have their scores posted daily.
CK-12 Foundation
Ck 12: Elem Math: Two Step Addition Sums to 100 Word Problems
[Free Registration/Login may be required to access all resource tools.] The video shows how to break down a word problem into two steps to solve an addition problem with numbers up to 100. The video is followed by a series of practice...
CK-12 Foundation
Ck 12: Elem Math: Selecting the Related Addition Fact
[Free Registration/Login may be required to access all resource tools.] The video describes how to determine which addition fact is related to the given addition problem. The video uses vocabulary of addends and sum. The video is...
CK-12 Foundation
Ck 12: Addition Sentences Up to Sum Ten
[Free Registration/Login may be required to access all resource tools.] The video uses pictures to determine which set of pictures represents the addition problem 3 + 6 = 9. The video is followed by practice problems.
CK-12 Foundation
Ck 12: Addition Sums to Ten
[Free Registration/Login may be required to access all resource tools.] The video uses a model to aide in showing how to add numbers up to ten. In addition to the video, there is a PLIX interactive challenge where students answer...
CK-12 Foundation
Ck 12: Arithmetic: Sums of Integers With Different Signs
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the sum of integers with different signs. Students examine guided notes, review guided practice, watch instructional videos and attempt...
CK-12 Foundation
Ck 12: Arithmetic: Sums of Integers on a Number Line
[Free Registration/Login may be required to access all resource tools.] In this lesson students find sums of integers by using a number line. Students examine guided notes, review guided practice, watch instructional videos and attempt...
Alabama Learning Exchange
Alex: Camp Add 'Em Up Iii
Camp Add 'Em Up is a series of lessons for first grade students. Students will use prior knowledge of friendly numbers (two number combinations that make a "10") and "adding on" as they master the ability to add three numbers. In this...
Alabama Learning Exchange
Alex: Carlos the Centipede Is Adding Decimals!
In this instructional activity, young scholars will work in collaborative/cooperative groups to understand adding decimals. Students will use decimal grids to represent the sum of decimals. Emphasis is on using place-value, lining up the...
Alabama Learning Exchange
Alex: Mix It Up!
By now, students have learned that fact families include both addition and subtraction facts. They have also learned that by reversing the order of the addends, they can form related addition facts with the same sum. The students will...
Alabama Learning Exchange
Alex: Cracker Math (Commutative Property)
During this instructional activity students will listen to the story FISH EYES: A BOOK YOU CAN COUNT ON by Lois Ehlert and use concrete objects to explore the commutative property of addition. During this instructional activity students...
Better Lesson
Better Lesson: Any Order
The numbers in an addition number sentence (addends) can be added in any order and the sum remains the same.
ABCya
Ab Cya: Sum of All Dice
The Sum of All Dice is a great game for children to practice addition! Swipe the screen to roll 2 through 5 dice. After adding the total on the dice, click on the correct sum listed on the chalkboard! If the dice roll out of view, simply...
Louisiana Department of Education
Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide Place Value, Rounding & Algorithms for Add'n and Subtr'n
A guide to support parents as they work with their students in place value, rounding, and algorithms for addition and subtraction.
E-learning for Kids
E Learning for Kids: Math: Olive Trees: Data & Chance
Ariel is taking a survey. Do you want to help her collect and describe data?
E-learning for Kids
E Learning for Kids: Math: Penguins: Addition
Meet Pickles the penguin and visit Antarctica for an addition adventure.
Disfruta Las Matematicas
Disfruta Las Matematicas: Hojas De Ejercicios De Sumas
This site contains worksheets dealing with sum. You may choose from simple exercises to very advanced exercises. Each learning exercise has thousands variations so you will never run out of practice material. You can see them on the...
AAA Math
Aaa Math: Place Values: Expanded Form
This site explains how to write whole numbers in expanded form. It provides games and exercises to practice the skill.
Wolfram Research
Wolfram Math World: Resultant
Defines resultant as the result of combing two or more vectors. Includes formulas and links to related terms.