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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…
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