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Rules for Number Divisibility

REVIEW MULTIPLICATION FACTS!
EVEN Numbers: End in: 0, 2, 4, 6, or 8
ODD Numbers end in: 1, 3, 5, 7, 9
ALL EVEN numbers are Divisible by "2" but not all odd numbers are divisible by 3!

Rules:
By 2: all Even numbers ending in (0,2, 4, 6, or 8)
By 3: Sum of the digits: add up the Numbers. Is the total divisible by 3?
By 4: if last two digits is divisible by 4
By 5: Ends in 0 or 5.
By 6: EVEN AND divisible BY '3'
BY 8: Last THREE digits are divisible by 8
By 9: Sum of the digits: add up the Numbers. Is the total divisible by 9?
By 10: ends in ZERO.


A16: Divisibility Worksheet
C7 Baseball Cards
C8 Friendly Advice




FACTORING : The PRODUCT of TWO Numbers (Usually WHOLE and POSITIVE)


Puzzle: A17 The Skunk


C9 Tower Factors
C10 Why Pins Get Lost
C11 Crayons and Paint

A-A-A Math Lesson and Games (Games 1 and 3)

Multiplication Review

A7: Multiplication Fact Review



On-Line Division Lesson

Division Worksheet PDF