Divisibility Rules.

Slides:

Advertisements

Similar presentations

Divisibility Rules.

Advertisements

Divisibility Rules. Divisibility What is Divisibility ? Divisibility means that after dividing, there will be NO remainder.

Rules of Divisibility. Divisible by 2? If the last digit is even then the number is divisible by 2. Even digits are 0, 2, 4, 6 and 8 (yes zero is even!)

Discovering Divisibility Rules.

Divisibility Rules Page 10 in textbook.

11 and 6 3 and 9 2, 5, 10 and 4, 8 Divisibility Rules.

Divisibility Rules How do we know when we can divide one number into another exactly?

Divisibility Rules and Mental Math

Objective: Learn to test for divisibility.

Learn: To use divisibility rules. These rules let you test if one number can be evenly divided by another, without having to do too much calculation!

1.5 Divisibility Rules SRB pg 11..

SWBAT to use divisibility rules for 2, 3, 4, 5, 6, 8, 9, and 10

Divisibility Rules and Number Theory

Divisibility rules.

Rules of Divisibility 1 - always a factor. 2 - if the last digit is a 0, 2, 4, 6, or if the sum of the digits is divisible by if the last.

Divisibility Rules!.

Divisibility Rules!. What is Divisibility? Divisibility means that after dividing, there will be no remainders. The divisor can evenly divide into the.

DIVISIBILITY RULES.

What is Divisibility? Divisibility means that after dividing, there will be No remainder.

Ways to Check for Divisibility Dividing By 1 All numbers are divisible by 1.

DIVISIBILITY Rules. Divisibility What is Divisibility ? Divisibility means that after dividing, there will be NO remainder.

Divisibility Rules and Finding Factors

Divisibility Rules: What are they? Rules to help you determine if numbers are divisible by other numbers. Divisible – if a number can be divided by another.

Divisibility and Mental Math. Vocabulary A number is divisible by another number if it can be divided into and result in a remainder of is divisible.

2, 3, 5, 9, 10 “Divisible BY” What does it mean?

Divisibility Tests How can you tell quickly whether a number can be divided exactly by another?

Divisibility Rules. Divisibility What is Divisibility ? Divisibility means that after dividing, there will be NO remainder.

Divisibility Rules 01 Number Theory

Divisibility Rules. What Are Divisibility Rules? They are a quick way to tell if one number can be completely divided into another without a remainder.

DIVISIBILITY RULES LESSON 3. Dividing by 2 All even numbers are divisible by 2. Example: all numbers ending in 0,2,4,6 or 8.

Divisibility and Mental Math Lesson 3-1. Vocabulary A number is divisible by another number if it can be divided into and result in a remainder of 0.

Divisibility Rules.

The Rules for Divisibility Focus 3: 6.NS.2. Start on a “Fresh Left” page! Heading for your Math Workbook Page "Divisible By" means "when you divide one.

My Book of Divisibility. THE 2’s Example: 30, 42, 24, 76, 98, Must be an even number Number must end in a 0, 2, 4, 6, or 8.

Ways to Check for Divisibility Dividing by 2 All even numbers are divisible by 2 Even numbers are numbers that end with either 2, 4, 6, 8, or 0.

DIVISIBILITY RULES. A number is divisible by: If the number ends in 0 the number is also divisible by 2 and 3 the sum of the number's digits.

3x + 2 6x3 - 5x2 – 12x – 4 2x2 – 3x – 2 6x3 + 4x2 -9x2 – 12x -9x2 – 6x

Divisibility Rules.

Divisibility Rules.

Divisibility Rules Practice 2, 5, or 10?

Divisibility Rules!.

___________ ____ 2, 3, 4, 5, 6, 9, 10.

Divisibility Rules.

Ways to Check for Divisibility

Divisibility Rules Divisible by: If: Example: 2

Divisibility and Mental Math

Divisibility and Mental Math

Divisibility Rules.

Divisibility and Mental Math

Divisibility Rules.

Divisibility Rules.

Divisibilty Rules!.

Divisibility Rules.

Divisibility Rules!.

Divisibility Rules.

Divisibility Rules.

Divisibility Rules.

Divisibility Rules How to Check for Divisibility

Section 4.1 Divisibility and Factors

Divisibility Rules.

Divisibility Rules.

Objective: Learn to test for divisibility.

How do we know when we can divide one number into another exactly?

Divisibility Rules.

Rules of Divisibility A number is said to be “divisible” by a number if you can divide it by that number and get no remainder.

Divisibility Rules.

10 questions in 5 minutes .. Can you beat the time?

Divisibility Rules Dividing by 2

Reducing (Simplifying) Fractions

Divisibility A number is divisible by another number if the quotient is a whole number with no remainder.

Presentation transcript:

Divisibility Rules

What is Divisibility? Divisibility means that after dividing, there will be NO remainder.

356,821 The divisibility rules can help YOU !!! Can you tell by just looking at this number if it is divisible by 2? by 5? by 10? by 3 ? by 9? By 6? The divisibility rules can help YOU !!!

Divisibility Rules help you learn shortcuts to tell when a number can be divided by another number with NO remainder.

Divisibility by 2 A number is divisible by 2 if the number is even. 18 ÷ 2 = 9 22 ÷ 2 = 11 (Notice that both of these numbers are even.) 21 ÷ 2 = 10 R1 (Not an even number.)

Are these numbers divisible by 2? 127 (Not an even number) 937 4678

Divisibility by 5 A number is divisible by 5 if it ends in 0 or 5. 25 ÷ 5 = 5 23 ÷ 5 = 4 R3

Divisibility by A number is divisible by 10 if it ends in 0. 30 ÷ 10 = 3 340 ÷ 10 = 34 67 ÷ 10 = 6 R7 784 ÷ 10 =78 R4

Divisibility By: 2 5 10 1825 346 510 1108

Divisibility by 3 A number is divisible by 3 if the sum of the digits is divisible by 3. Is the number 135 divisible by 3? Add the digits: 1 + 3 + 5 = 9 Yes, 135 is divisible by 3 because the sum of the digits is divisible by 3.

Divisibility by A number is divisible by 9 if the sum of its digits is divisible by 9. 369 is divisible by 9 because 3 + 6 + 9 =18 1 + 8 = 9 AND 9 is divisible by 9.

Review Divisible by 3 Divisible by 9 204 15,192

Review Divisible by 3 Divisible by 9 204 15,192

Review Divisible by 3 Divisible by 9 204 15,192

Divisibility by 4 A number is divisible by 4 if the last two digits are divisible by 4. (Double 00) Is 124 divisible by 4? Is 7,235 divisible by 4?

Divisibility by 6 A number is divisible by 6 if it is divisible by both 2 and 3. Is 342 divisible by 6? Is 51 divisible by 6?

Review Divisible by 4 Divisible by 6 3,824 6,018 24,000

Review Divisible by 4 Divisible by 6 3,824 6,018 24,000

Review Divisible by 4 Divisible by 6 3,824 6,018 24,000

Review Divisible by 4 Divisible by 6 3,824 6,018 24,000

After All, DIVISIBILITY Rules Are…

Un-frog-getable !! The End !!