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

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Presentation transcript:

2, 3, 5, 9, 10

“Divisible BY” What does it mean?

“Divisible by” means: If you divide one number by another, the result is a whole number WITHOUT a remainder. Examples: 12 ÷ 6 = 2 No remainder 15 ÷ 5 = 3 No remainder

Divisibility Rule 2 A number is divisible by 2 if the last digit is even. (0, 2, 4, 6, 8) Examples: Review Even numbers: ghosteven ghosteven

Now You Try: Which number IS NOT divisible by 2? Need More Practice: Numbers Divisible by 2Numbers Divisible by 2

WONDERFUL

It ends in a 0, 2, 4, 6, or 8.

Divisibility Rule 3 A number is divisible by 3 if the sum of the digits is divisible by 3. Examples: 75 : = 12, 12 ÷ 3 = 4 No Remainder 75 : = 12, 12 ÷ 3 = 4 No Remainder 369: = 18, 18 ÷ 3 = 6 No Remainder 369: = 18, 18 ÷ 3 = 6 No Remainder

Now You Try: Which number IS NOT divisible by 3? Need More Practice: Numbers Divisible by 3Numbers Divisible by 3

The sum is divisible by 3.

WONDERFUL

Divisibility Rule 5 A number is divisible by 5 if the last digit is a 0 or 5. Examples: 615ends in a 5 615ends in a ends in a 0

Now You Try: Which number IS NOT divisible by 5? Need More Practice: Numbers Divisible by 5Numbers Divisible by 5

The number ends in a zero or a five.

Wonderful

Divisibility Rule 9 A number is divisible by 9 if the sum of the digits is divisible by 9. Examples: 963: = 18, 18 ÷ 9 = : =18, 18 ÷ 9 =2 5445: =18, 18 ÷ 9 =2

Now You Try: Find the number that IS NOT divisible by Need More Practice: Numbers Divisible by 9 and 10 Numbers Divisible by 9 and 10Numbers Divisible by 9 and 10

The sum of the digits is divisible by 9.

Great Job!!!

Divisibility Rule 10 A number is divisible by 10 is it ends in a ZERO. Example: 7630ends in a zero 410ends in a zero 410ends in a zero

Now You Try: Find the number that IS NOT divisible by 10 56, ,

The number ends in a ZERO.

Way To Go!!

2 if the last digit is even. 3 if the sum of the digits is divisible by 3. 5 If the last digit is 0 or 5. 9 if the sum of the digits is divisible by if the last digit is 0.