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Multiplication Pg. 3Division Pg. 4Divisibility Rules Pg. 5

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“Divisible by” means:It goes into the other number without a remainder!

Examples:

12 ÷ 6 = 2 15 ÷ 5 = 3

Number: 2A number is divisible by 2 if the

last digit is even. (0, 2, 4, 6, 8)

Examples: 78 3470

Now You Try:Which number IS NOT divisible

by 2?

572 1464 249

Need More Practice: Numbers Divisible by 2

Number: 3*Hint add the digits and see if you can divide that number by 3

Examples: 75 7 + 5 = 12 12 ÷ 3 = 4

Number: 5A number is divisible by 5 if the last

digit is a 0 or 5.Examples:

615 ends in a 5

1480 ends on a 0

Now You Try:Which number IS NOT

divisible by 5?

9820 779 560

Number:10A number is divisible by 10 is if it ends in a

ZERO.

Example:

7630 ends in a zero

410 ends in a zero

Now You Try:Find the number that IS NOT divisible by ten.

56,920 7537870

Number: 4A number is divisible by 4 if the last two digits are divisible by 4.

Examples:

1320 20 ÷ 4 = 5

672 72 ÷ 4 = 18

Now You Try:Which number IS NOT divisible by 4?

524 4101 116

Need More Practice: Numbers Divisible by 4

Number: 6A number is divisible by 6 when it is divisible by 2 AND 3.

Examples: 408 ends in an even number (2 rule)

sum of the digits is divisible by 3

Now You Try:Which number IS NOT divisible by 6?

8700 523 7602

Number: 9A number is divisible by 9 if

the sum of the digits is divisible by 9.

Example: 963

9 + 6 + 3 = 18 18 ÷ 9 = 2

Number Number TheoryTheory

What does that mean?

What is an even number?What is an even number?

•Can be divided by 2•Unit digit is 0, 2, 4, 6, or 8• Is a multiple of 2

•782,444•4•608

What is an odd number?What is an odd number?

•Cannot be divided by 2•Unit digit is 1, 3, 5, 7, or 9•Is not a multiple of 2

•782,333•5•607

EVEN + EVEN = ?EVEN + EVEN = ?

12 + 412 + 4

ODD + ODD = ?ODD + ODD = ?

11+911+9

EVEN + ODD = ?EVEN + ODD = ?

8+78+7

Number Theory…Number Theory…