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Interactive
Quia

Ixl Learning: Estimate Sums With Numbers Up to 100,000

For Students 3rd - 5th
Practice rounding numbers to the nearest ten to estimate the sum.
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Activity
Lawrence Hall of Science

The Math Page: Skill in Arithmetic: Table of Contents

For Students 3rd - 8th Standards
This website from The Math Page explains some helpful hints about how to do mental math.
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Professional Doc
Louisiana Department of Education

Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Sums and Differences to 20

For Students 1st Standards
A guide to support parents as they work with their students in sums and differences to 20.
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Interactive
ICT Games

Ict Games: 100 Hunt: +10

For Students 2nd - 3rd
You will need to add 10 to the target number given. Find the sum and click on it in the hundreds chart. See if you can keep your time score as low as possible.
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Whiteboard
ClassFlow

Class Flow: What Is the Sum Chicken Little?

For Teachers Pre-K - 1st
[Free Registration/Login Required] This flipchart is intended for students to practice one-digit addition. It follows Chicken Little as he tries to learn to add. It is a fun flipchart for addition!
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Whiteboard
ClassFlow

Class Flow: Making a Ten Adding Two Digit Numbers

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] This flipchart introduces the concept of addition of sums of 10 or more than 10. The flipchart has examples with visuals to help students understand tens and ones. It would be useful when beginning a...
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Professional Doc
Louisiana Department of Education

Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide: Sums and Differences to 10

For Students 1st Standards
A guide to support parents as they work with their students in sums and differences to 10.
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Unknown Type
Math Slice

Math Slice Fast Sum

For Students 1st - 3rd Standards
This resource is a set of ten timed practice problems where parameters are selected for the sum and the range of addends. The sum and one addend are given and students determine the missing number to create the sum. Instant feedback and...
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Whiteboard
ClassFlow

Class Flow: Estimating Sums and Differences

For Teachers 1st - 3rd Standards
[Free Registration/Login Required] This flipchart is designed to teach third grade students the steps in estimating sums and differences. It also reviews rounding numbers to the nearest ten and hundred.
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Unit Plan
Math Slice

Basic Operations: Addition

For Students 3rd - 5th
This resource covers basic addition where students can choose a range of numbers including negatives or even decimals. After selecting parameters students are timed completing ten problems with instant feedback and an opportunity to...
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Unknown Type
Other

Internet 4 Classrooms: Add Two Numbers Within 5

For Students K Standards
A ten-question quiz where students add two numbers where the sum is up to 5.
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Interactive
Digital Dialects

Digital Dialects: Numbers in Italian 10 100

For Students 3rd - 8th
Play this game to match two written Italian number words to their sum in Italian. The numbers are multiples of ten, up to one hundred.
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Activity
University of Cambridge

University of Cambridge: Nrich: Adding Plus

For Students Pre-K - 1st
On this one page website sharpen your logic and addition skills while working on this challenge. The solution is available to double check your solution.
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Professional Doc
Louisiana Department of Education

Louisiana Doe: Louisiana Believes: Eureka Math Parent Guide Place Value, Rounding & Algorithms for Add'n and Subtr'n

For Students 4th Standards
A guide to support parents as they work with their students in place value, rounding, and algorithms for addition and subtraction.
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Lesson Plan
Alabama Learning Exchange

Alex: Camp Add 'Em Up Iii

For Teachers Pre-K - 1st
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...
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Whiteboard
ClassFlow

Class Flow: Fact Families

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] In this activity, students use the visual cues from a fact family triangle, manipulatives and numbers to understand and apply the concepts and procedures of mathematics including addition, subtraction,...