div_rules

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Slide 1: 

Ways to Check for Divisibility Divisibility Rules

Dividing By 1 : 

Dividing By 1 All numbers are divisible by 1

Now You Try : 

Now You Try Are these numbers divisible by 1? 578 398 48 1903 490

Dividing by 2 : 

Dividing by 2 All even numbers are divisible by 2 Even numbers are numbers that end with either 2, 4, 6, 8, or 0

Now You Try : 

Now You Try Are these numbers divisible by 2? 458 1279 759 555 1050

Dividing by 3 : 

Dividing by 3 Add up the digits of the number If that number is divisible by 3, then the original number is If your sum is still a big number, continue to add the digits

Dividing by 3 : 

Dividing by 3 If that number is divisible by 3, then the original number is If your sum is still a big number, continue to add the digits Add up the digits of the number 18 Is 18 divisible by 3? 1 + 8 = 9 Is 9 divisible by 3?

Now You Try : 

Now You Try Are these numbers divisible by 3? 639 56 86 360 468

Dividing by 4 : 

Dividing by 4 If the last 2 digits together are divisible by 4

Now You Try : 

Now You Try Are these numbers divisible by 4? 584 261 56 920 767

Dividing by 5 : 

Dividing by 5 If the number ends in 5 or 0

Now You Try : 

Now You Try Are these numbers divisible by 5? 554 6890 345 902 845

Dividing by 6 : 

Dividing by 6 If the number is divisible by 2, and . . . If the number is divisible by 3

Now You Try : 

Now You Try Are these numbers divisible by 6? 897 258 630 345 84

Dividing by 7 : 

Dividing by 7

Now You Try : 

Now You Try Are these numbers divisible by 7? 578 398 48 1903 490

Dividing by 8 : 

Dividing by 8 If the last three digits are divisible by 8 If the number is divisible by 2, then by 2 again, and then by 2 again

Now You Try : 

Now You Try Are these numbers divisible by 8? 568 396 48 1903 490

Dividing by 9 : 

Dividing by 9 Similar to dividing by 3 Add up digits If that number is divisible by 9 then your number is divisible by 9

Dividing by 9 : 

Dividing by 9 If that number is divisible by 3, then the original number is If your sum is still a big number, continue to add the digits Add up the digits of the number 27 Is 27 divisible by 9? 2 + 7 = 9 Is 9 divisible by 9? For example, take the number 924,561

Now You Try : 

Now You Try Are these numbers divisible by 9? 578 398 48 1903 490

Dividing by 10 : 

Dividing by 10 If the number ends with a 0

Now You Try : 

Now You Try Are these numbers divisible by 10? 578 398 48 1903 490

Dividing by 11 : 

Dividing by 11

Now You Try : 

Now You Try Are these numbers divisible by 11? 578 398 48 1903 490

REVIEW : 

REVIEW Divisible by 1 Divisible by 2 Divisible by 3 Divisible by 4 Divisible by 5 Divisible by 6 Divisible by 6 Divisible by 8 Divisible by 9 Divisible by 10 Divisible by 11

Assignment : 

Assignment Tell what each number is divisible by, either 2, 3, 4, 5, 6, 7, 8, 9, 10, or 11 186 85 69 298 747 3870 7896 69095 4892 3487 952 3650 2738 1132 5084

Slide 28: 

That's all Folks!

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