Divisibility Rules Teacher Resources

The divisibility rules are invaluable tools to possess. Sal teaches students to recognize divisibility using the divisibility rules. He explains why 380 is divisible by some numbers and not by others. Tip: Create a handout on the...

What a useful resource! Use this presentation to introduce your learners to the rules of divisibility. This step by step exploration lists the rules for dividing by 2, 3, 4, 5, 6, 8, and 9. Practice questions are included. Excellent!

Equipped with several examples from the attached module and from standardized tests, Sal takes viewers through the process of prime factorization and divisibility. He demonstrates each skill several times with many different numbers,...

Learning division is a challenge for many young mathematicians, but this presentation on divisibility rules can make it much easier. Seven different rules are clearly explained and modeled with the support of multiple examples. Consider...

How will learning about the divisibility rules help you do better in math? Well, if you have multi-digit numbers to factor, these rules will definitely help you factor numbers more quickly.

Examine the processes for determining the divisibility of a number. Some divisibility rules are simple, such as divisible by two or five, while others are more complex. The video explains the divisibility rules for numbers from two...

Who knew the sum of a number's digits gives such interesting information? The 18th installment of a 21-part module has scholars investigate division by three and nine. After looking at several examples, they develop divisibility tests...

How do you know if a number is divisible? Instructors first prove the divisibility rules for three and four and then class members use this modeling to prove given divisibility rules for eight and nine either individually or in groups.

What do divisibility and factoring have to do with each other? Well, if a whole number is the divisor and a whole number is the answer then both those numbers are factors of the number being divided. But if the answer is a decimal number...

So, you have a large number that is being divided by a smaller number. Learn a few tricks to make dividing a little more palatable. 2-is it even, 3-do the digits add up to a multiple of three, 5-does it end in 0 or 5, 6-is it divisible...

Number patterns help your kids learn divisibility and estimation rules. This activity aims to strengthen their math fact memorization skills by presenting several rules they are expected to memorize through practice.

It's not a short cut, just good old fashion number sense, but kids will love it. This presentation does a wonderful job describing the divisibility rules by showing how each one works, reviewing the rules as a collective and providing an...

For this math worksheet, students solve twenty division problems. After solving each problem, students state the divisibility rule which proves each answer. Divisibility rules for 2, 3, 4, 5, 6, 9, and 10 are assessed.

There's a lot to remember when it comes to math concepts. Help scholars get a head-start to learning division with a reference page offering divisibility rules for the numbers two, three, four, five, six, eight, nine, and 10. 

In this divisibility and factors worksheet, students use the rules of divisibility to identify factors of a number. This two-page worksheet contains 26 problems. Answers are provided on the last page.

If your class has watched the Khan Academy video on recognizing divisibility, they will have a good foundation for this video on finding factors. Sal demonstrates how to find factors of a number by using the divisibility rules and...

Sixth graders strengthen their knowledge of the divisibility rules. Students access that mental math can be faster than the calculator for certain types of problems. Students can make generalizations and discover patterns in finding the...

Young learners apply divisibility rules to determine if a number is a factor of another number. They discuss what numbers are factors of another number and identify patterns using divisibility rules.

In this math instructional activity, students learn the divisibility rule for 9s-- if the sum of the digits in the dividend is a multiple of 9, there will be no remainder in the quotient. Students complete 27 division problems with a 4...

How do you find the factors of a given number? The teacher will show you how to use a table, test out your answers, and then write all your factors in a list. If you know the divisibility rules, that will also help you out.

In this divisibility instructional activity, 6th graders solve 10 different problems that include determining whether various numbers are divisible by other numbers. They write yes on the line provided if the number is divisible or no if...

In this divisibility rules worksheet, students tell whether 10 given numbers are divisible by 2,3,4,5,6,9 or 10. Answers are given on page 2, problems are printed 2 sets per page for copying purposes. 

In this remainders and divisibility activity, 3rd graders determine the divisibility of 10 numbers, then write the remainder if there is one.

Students explore the concept of divisibility. In this divisibility lesson, students determine which numbers are divisible by another number.