AAA Math
Aaa Math: Adding Three Digit Numbers
Read through this explanation of how to add three digit numbers. Use the online game to practice this skill. The game will keep running totals of your correct and incorrect answers. It will also show you a percent score of the correct...
NumberNut
Number Nut: Addition: 3 Digit Numbers
Three digit addition requires working from left to right and may require carrying. Follow the steps in the examples and then practice the skills with the two interactive activities.
Illustrative Mathematics
Illustrative Mathematics: 3.oa Symmetry of the Addition Table
The goal of this task is to help students understand the commutative property of addition by examining the addition facts for single digit numbers. Aligns with CCSS.Math.Content.3.OA.D.9 Identify arithmetic patterns, and explain them...
CK-12 Foundation
Ck 12: Elem Math: Sums of Whole Numbers to 1000 (Grade 3)
[Free Registration/Login may be required to access all resource tools.] This site offers the video "Addition: 3 Digits." and a practice quiz in which students solve problems using addition to find the sum or summand of numbers up to 1000.
School Express
School Express: Online Addition
Great place to sharpen your addition skills. Start with basic facts and go all the way up to 3 digit addition with regrouping. You select the level of difficulty and the number of problems. You can also check your answer right away.
NumberNut
Number Nut: Carrying Like Addition
Use what you already know about addition to master this skill in multiplication. This lesson reviews the concept of carrying in multiplication. Detailed examples are provided along with interactive games to practice the skills learned....
CK-12 Foundation
Ck 12: Elem Math: Fact Families Numbers to 1000
[Free Registration/Login may be required to access all resource tools.] The video shows how to determine the missing number sentence when adding and subtracting 3-digit numbers by using fact families.
Varsity Tutors
Varsity Tutors: Aplusmath: Addition Worksheets
Create customized addition worksheets. Choose from basic facts to four-digit by four-digit questions. The size of problem set can be selected, as well as whether the format will be vertical or horizontal. An answer key can also be...
NumberNut
Number Nut: Subtraction: 3 Digit Numbers
A brief lesson on subtracting from three-digit numbers that includes detailed examples, rules, and further explanation of borrowing.
Teaching Treasures Publications
Teaching Treasures: Year Four Math (Page 4)
This interactive worksheet that focuses on all four operations including three-digit addition and subtraction and basic multiplication and division facts. This easy to navigate tool gives learners immediate feedback. Problems presented...
Teaching Treasures Publications
Teaching Treasures: Year Four Math (Page 3)
Build your computation skills using this interactive worksheet that focuses on all four operations including three-digit addition and subtraction and basic multiplication and division facts. This is an easy to navigate tool and learners...
Khan Academy
Khan Academy: Add 10s and 100s (No Regrouping)
Practice solving problems like 344+20 and 344+200. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Queen's Printer for Ontario
E workshop.on.ca: Effective Instr'n in Math, K 6: Multidigit Computation [Pdf]
Volume 5 in an eworkshop Guide to Effective Instruction in Math outlines and illustrates instructional strategies for teach basic facts and multidigit computation to students in kindergarten through grade 6.
Varsity Tutors
Varsity Tutors: Aplus Math: Online Multiplication Worksheets
Create customized interactive online multiplication worksheets. Choose from up to three-digit by three-digit questions. The size of problem set can also be selected, as well as whether the format will be vertical or horizontal. Select...
CK-12 Foundation
Ck 12: Elem Math: Filling in the Missing or Sign Numbers to 1000
[Free Registration/Login may be required to access all resource tools.] The video works through a 3-digit addition problem to determine if the correct operation for the number sentence is addition or subtraction. The video is followed by...
Varsity Tutors
Varsity Tutors: Aplusmath: Decimal Subtraction Worksheets
Create customized decimal subtraction worksheets. Choose from basic facts to four-digit by four-digit questions. The size of problem set can be selected, as well as whether the format will be vertical or horizontal. An answer key can...
Teaching Treasures Publications
Teaching Treasures: Year Three Math (Page 1)
Sharpen your mathematical skills with this interactive worksheet that combines two-digit addition, two-digit subtraction, and basic multiplication facts. This activity is easy to grasp and gives learners immediate feedback to their...
Teaching Treasures Publications
Teaching Treasures: Year Three Math (Page 5)
Sharpen your computation skills with two-digit addition, two-digit subtraction, and one-digit multiplication facts using this interactive worksheet. Learners must be familiar with multiplication facts through twelve to be successful....
Teaching Treasures Publications
Teaching Treasures: Year Three Math (Page 6)
Use this interactive worksheet to practice or assess skills in two-digit addition, two-digit subtraction, and one-digit multiplication facts. This is an easy to grasp activity that gives learners immediate feedback to responses.
AAA Math
Aaa Math: Adding Three Numbers
Use this online game to practice adding three single digit numbers. The game gives running totals of your correct and incorrect answers, as well as a percent score of your correct answers.
Teaching Treasures Publications
Teaching Treasures: Year Four Math (Page 2)
This interactive worksheet combines all four operations. The focus is on three-digit addition and subtraction and basic multiplication and division facts. This easy to navigate activity offers learners immediate feedback and would be...
Varsity Tutors
Varsity Tutors: Aplus Math: Non Java Flashcards (Mixed Topics)
Find a great selection of non-Java math flashcard activities. Choose from an index of flashcard topics of a variety of difficulty levels. Topics include: basic and advanced addition, subtraction, multiplication, and division, algebra,...
AAA Math
Aaa Math: Adding Hundreds
Practice adding hundreds with a game that keeps running totals of your correct and incorrect answers, as well as a percent score of your correct answers.