Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Divisibility Tests
Find a quick, concise explanation of how to use the rules for divisibility by the numbers 2 through 10. Examples are given and clearly explained for each of the divisibility rules.
McGraw Hill
Glencoe: Self Check Quizzes 1 Divisibility Patterns
Use Glencoe's randomly generated self-checking quiz to test your knowledge of divisibility patterns. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check It"...
Math Is Fun
Math Is Fun: Divisibility Rules
A chart that overviews divisibility rules for numbers divisible by numbers 2 through 12. Simple rules accompanied by examples.
Scholastic
Scholastic: Study Jams! Math: Multiplication and Division: Divisibility Rules
This site provides great practice on the concept of divisibility rules. Students can first learn about the topic by watching a step by step instruction video that also points out areas of concern. Finally, students can practice their...
Better Lesson
Better Lesson: Divisibility Rule for 4 and 5
Using calculators allows students to experiment and to discover patterns, in this case resulting in a divisibility rule for the number 4.
Better Lesson
Better Lesson: Divisibility Rules for 2 and 3
Sixth graders will work with calculators to discover the divisibility rules.
Texas Instruments
Texas Instruments: Divisibility Rules! Using Scientific Calculators
Concepts and skills covered in this activity include number theory, divisibility rules, multiples, factors, and problem-solving skills.
CK-12 Foundation
Ck 12: Arithmetic: Divisibility Rules to Find Factors
[Free Registration/Login may be required to access all resource tools.] Determine the factors of given numbers using divisibility rules.
Khan Academy
Khan Academy: Factors & Divisibility
Students practice multiple-choice problems with factors and divisibility.
Khan Academy
Khan Academy: Intro to Factors & Divisibility
Learn what it means for polynomials to be factors of other polynomials or to be divisible by them.
San Diego State University
San Diego State University: Divisibility War
This site offers the rules of divisibility and a game for practicing those rules. Everything is included in the site for making this game. Don't be discouraged by the length of the explanations!
Better Lesson
Better Lesson: Divisibility Rules for 6 and 9
Sixth graders use calculators to find the shortcut for dividing with 6 and 9.
ClassFlow
Class Flow: Divisibility & Factorials
[Free Registration/Login Required] Testing for divisibility of 0, 2, 3, 4, 5, 9, 10 & 11. This flipchart explores factorials and perfect numbers as well.
Lesson Tutor
Lesson Tutor: Divisibility Rules
A handy table of the rules of division is presented here. Examples are given for each of the rules, from the number 2 to the number 10. The site stresses that a list such as this isn't cheating, but rather a nice resource to have.
Quia
Quia: Divisibility and Prime
If you enjoy playing the game Battle Ship you will enjoy this game. When you locate an enemy ship to get the hit you must correctly answer a question using your knowledge of divisibility rules and prime numbers. It is a fun way to...
Other
Thales: Divisibilidad
Spanish content. Online lessons explaining divisibility, most common dividers, and least common multiples. Shows step-by-step examples, followed by a few example problems and solutions.
Illustrative Mathematics
Illustrative Mathematics: 4.oa Multiples of 3, 6, and 7
This task investigates divisibility properties for the numbers 3, 6, and 7. Aligns with 4.OA.C.
Lesson Tutor
Lesson Tutor: Divisibility Rules Worksheet
A worksheet of twenty practice problems is given here for students wishing more help with the concept of reducing fractions down to their lowest terms. The first several questions are accompanied with explanation, and a link to the...
Texas Instruments
Texas Instruments: A Prime Investigation With 7, 11, and 13
Students investigate the divisibility of 7, 11, and 13. They will also discover an interesting characteristic of six-digit multiples of 1001.
Other
Project Happy Child: 100s Board Worksheets
Use these 100s Boards to have students check for divisibility by 2-12 and for square and prime numbers. Just find the links below the 100s board that has the directions printed right on top of the worksheet.
Illustrative Mathematics
Illustrative Mathematics: 4.oa Multiples of Nine
This task examines the interesting fact that when a number is divisible by 9 then the sum of its digits is also divisible by 9. Aligns with 4.OA.C.5.
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Predicate Calculus
The resource investigates predicate calculus. The tutorial examines propositional calculus, universal quantifiers, mathematical statements, and divisibility. Students learn about the logic concepts through notes and examples. Practice...
E-learning for Kids
E Learning for Kids: Math: Penguins: Division
This interactive site allows students to practice their division skills. At the end of the lesson students will be able to divide mentally using divisibility tests, solve word problems using division strategies, and use a written...
ClassFlow
Class Flow: Number Sense Related to Division
[Free Registration/Login Required] This flipchart introduces divisibility, primes and composites, averages, and estimating quotients.
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