Khan Academy
Khan Academy: Adding Decimals: Tenths
Add two numbers that are either whole numbers or written to the tenths place value. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
ClassFlow
Class Flow: Counting Place Value
[Free Registration/Login Required] In this lesson students will understand place value by moving chips into the correct place. They will change numbers by 1000, 100, 10 or 1 by adding or taking away chips.
Alabama Learning Exchange
Alex: Carlos the Centipede Is Adding Decimals!
In this instructional activity, students 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...
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 100
A step-by-step tutorial showing how to add 2-digit numbers in place value columns without regrouping. Includes exercises to try. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000
Cool Math
Coolmath: Coolmath4kids: Adding Numbers Within 1000
Step-by-step tutorial showing how to add 3-digit numbers in place value columns with and without regrouping. CCSS.Math.Content.3.NBT.A.2 Fluently add and subtract within 1000
AAA Math
Aaa Math: Place Values by Adding: Expanded Form
Students can practice converting whole numbers from expanded form to standard form in a series of self-check exercises and timed learning games.
Khan Academy
Khan Academy: Adding Decimals: Tenths
Add two numbers that are either whole numbers or written to the tenths place value.
AAA Math
Aaa Math: Addition of Decimals
This lesson explains how to add decimals of the tenths place value. Gives practice and games to work on this skill.
ICT Games
Ict Games: Add 10 Sub Challenge
Students review addition while playing this two-player game. Players add ten to a given number. The first person to get five problems correct wins.
Math Is Fun
Math Is Fun: Decimals
A good introduction to decimals, which includes a definition of place value and several examples of decimal numbers. Follow links at the bottom of this page to access decimal worksheets as well as information on rounding numbers, adding...
PBS
Pbs Learning Media: How Far to Wells Road?
In this Cyberchase video segment, Bianca drives to visit her friend, but learns that she has incorrectly added decimal amounts, so she ends up at the wrong location.
SMART Technologies
Smart: Foundational Math Concepts for Elementary Ages
Practice everyday math skills such as adding, subtracting, multiplying, dividing, place value, counting money, telling time, fractions, decimals, and more.
Sophia Learning
Sophia: Adding and Subtracting Using Significant Figures: Lesson 2
This lesson will demonstrate how to add/subtract measurements and report the result to the correct number of significant digits. It is 2 of 3 in the series titled "Adding and Subtracting Using Significant Figures."
CK-12 Foundation
Ck 12: Math Grade 4
Browse resources related to fourth-grade math standards. Click on a topic for interactive lessons, videos, and extra practice.
Khan Academy
Khan Academy: Add and Subtract on the Number Line Word Problems
Practice adding and subtracting using the number line. Numbers used are 100 or less.
Khan Academy
Khan Academy: Add and Subtract Using a Number Line
Practice adding and subtracting numbers like 54 and 37 using a number line. Numbers used in these problems are all less than 100.
Khan Academy
Khan Academy: Add Within 100
Practice adding two-digit numbers. All numbers in these problems are 100 or less.
Khan Academy
Khan Academy: Add and Subtract Within 100 Word Problems 1
Practice adding and subtracting to solve word problems. These questions are result unknown or change unknown problems. Numbers used are 100 or less.
PBS
Pbs Learning Media: Fresh Pick Challenge: Logical Lunch
By using their deductive reasoning skills, children can help Henry and Avril pack a perfect picnic lunch. This activity will provide them with ways to use clues to solve a problem, group objects based on several attributes, and...
Math Is Fun
Math Is Fun: Definition of Abacus
You can use an abacus to count, add, subtract, multiply and more. Try this interactive abacus and see if you can make the numbers. Choose "here's more" for some clues. Good luck!
ClassFlow
Class Flow: Everyday Math Gr5 1.1
[Free Registration/Login Required] This lesson was made to compliment Everyday Mathematics Grade 5, Lesson 1.1. It includes the poem, Arithmetic, math boxes with added materials, and High Number Toss math game.
PBS
Pbs Learning Media: Math + Arts: Jack & the Zero Clan
In this lesson, students will create and solve a word problem related to adding and subtracting within 1,000, develop a script for a short scene using dialect, and perform it using the elements of performance, specifically acting,...
Khan Academy
Khan Academy: Add 1s or 10s (No Regrouping)
Practice solving problems like 34+5 and 34+50.
Education Place
Houghton Mifflin: Eduplace: Extra Practice Quiz Evaluate Expressions 1
Practice evaluating these algebraic expressions. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told the correct answer. See how many...