Curated OER
Math Games for Skills and Concepts
A 27-page packet full of math games and activities builds on algebra, measurement, geometry, fractional, and graphing skills. Young mathematicians participate in math games collaboratively, promoting teamwork and skills practice.
Illustrative Mathematics
Jayden’s Snacks
A quick activity to test the knowledge of your learners on adding and subtracting with decimals. They must calculate how much Jayden spent at the store and how much money he has remaining.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Add and Subtract Decimals
Find a quick, concise explanation of how to add and subtract decimals. Step by step examples are included to help you understand how to line up the decimals points and then find the sum or difference.
OnlineMathLearning.com
Online Math Learning: Adding & Subtracting Positive & Negative Decimals
An interactive worksheet for practice in the addition and subtraction of decimals with positive and negative signs.
Other
Mathpower: Elementary Algebra Assignments
Test your algebra aptitude at this colorful website filled with algebra assignments for upper elementary and middle school students. Assignments explore algebra concepts using addition, subtraction, multiplication, fractions, division,...
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...
Texas Instruments
Texas Instruments: Putting Things in Place
In this activity, students investigate the value of the digits in $8,205.50 and determine the number of thousands, hundreds, tens, ones and even the number of dimes and pennies. The concept is then extended to additional situations. They...
Teaching Treasures Publications
Teaching Treasures: Year Eight Timed Mental Math
Improve your computation skills using this timed interactive worksheet.