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University of Texas
Inside Mathematics: Adding Numbers [Pdf]
This task challenges a student to use knowledge of place value to solve a problem using a variety of strategies.
Better Lesson
Better Lesson: Adding and Subtracting Multiples of Ten
Students will apply the idea of adding or subtracting ten to a number by adding or subtracting multiple groups of ten from a number. Included is a detailed lesson plan, videos of the lesson in action, materials and worksheets, and center...
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.
Better Lesson
Better Lesson: 10 More and 10 Less
This lesson is More or Less a great lesson! Engage students in finding 10 more and 10 less than a number using these fun activities. Includes an eSpark video on place value, detailed lesson plan, copy of a hundreds chart, and practice...
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
Study Pad
Splash Learn: Add Decimals Using Models
[Free Registration/Login Required] This fun decimal addition worksheet introduces students to the world of operations with decimal numbers. Fifth graders use models to visualize the addition of numbers in the tenths and hundredths places...
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.
University of Colorado
University of Colorado: Ph Et Interactive Simulations: Make a Ten
An interactive simulation that teaches about place value, addition, and subtraction by adding, breaking apart, and combining numbers by making tens and focusing on place value. This simulation can either be downloaded or played online...
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.
Illustrative Mathematics
Illustrative Mathematics: Peyton and Presley Discuss Addition
The purpose of this task is to support students in developing an understanding of a place value strategy for adding numbers. By using a representation to visualize the abstract notation, students will make sense of the strategy, adding...
ArtsNow
Arts Now Learning: All in a Row [Pdf]
This lesson will allow students to represent place values with their bodies to allow them to visualize how 1, 2, and 3 digit addition works.
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...
Better Lesson
Better Lesson: Mentally Speaking!
Using base ten blocks and place value, 2nd graders explore how to become more fluent in adding and subtracting two-digit numbers without regrouping.
National Council of Teachers of Mathematics
Nctm: Illuminations: Grouping and Grazing
Help the alien spaceship move cows into corrals by counting, adding, and subtracting. This activity helps children learn grouping, tally marks, and place value.
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."
Common Core Sheets
Common Core Sheets: Number and Operations in Base Ten 5.nbt.7 Worksheets
Teachers can assess students' knowledge of adding, subtracting, multiplying, and dividing decimals to hundredths with these printable worksheets. You can even create your own worksheet or flashcards.
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.