Lesson 1. DefinitionExamples  Ends 0, 2, 4, 6, or 8  1,234  98  456  1,592,342.

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Presentation transcript:

Lesson 1

DefinitionExamples  Ends 0, 2, 4, 6, or 8  1,234  98  456  1,592,342

DefinitionExamples  Ends 1, 3, 5, 7, or 9  1,243  89  465  1,592,423

DefinitionExamples  Can be divided by with no remainder  45 is divisible by 5  36 is divisible by2  320 is divisible by 10

How did I do this so fast?  8,375,895 ÷ 5  1,568,342 ÷ 5  9,853,479 ÷ 2  27,853,024 ÷ 2  4,182,010 ÷ 3  3,293,121 ÷ 3  653,890 ÷ 10  5,278,825 ÷ 10

RULEExamples  It is even (ends 0, 2, 4, 6, or 8)  1,234  98  456  1,592,342 2 is the ONLY even prime #

RULEExamples  The sum of the digits is divisible by 3  =9 9 is divisible by 3 so 234 is divisible by 3

RULEExamples  It ends with 0 or 5  935  1,340  2,908,675

RULEExamples  It is divisible by 2 and 3  234 Ends 4 so divisible by =9 9 is divisible by 3 so 234 is divisible by 3  Divisible by 2 and 3 so divisible by 6

RULEExamples  The sum of the digits is divisible by 9  =9 9 is divisible by 9 so 135 is divisible by 9

RULEExamples  It ends with 0  90  1,234,560  250  4,350

DefinitionExamples  Has exactly 2 factors (1 X itself)  29 1 X 29  97 1 X 97

DefinitionExamples  Has more than 2 factors  12 1 X 12 2 X 6 3 X 4

For numbers through 100  Is it divisible by 2 (other than the #2) – composite  Is it divisible by 3 (other than the # 3) – composite  Is it divisible by 5 (other than the #5) – composite  Magic numbers 49, 77, & 91 are composite because they are multiples of 7

DefinitionExamples  the integers (numbers) multiplied to get a product  3 X 4=12 factor product

DefinitionExamples  Number written as a power that tells how many base numbers are being multiplied  X10X10=1,000 Base # exponent

DefinitionExamples  Largest factor 2 or more numbers have in common  6 1X6 2X3  9 1X9 3X3 3 is the GCF

DefinitionExamples  Product of a given whole number and an integer  Multiples of 3  3,6,9,12… 3X1, 3X2, 3X3, 3X4…

DefinitionExamples  Smallest multiple two or more numbers have in common  4 4,8, 12  6 6,12 12 is the LCM

DefinitionExamples  Break into smaller parts  (2X10) (3 X10) + 7  12 2 x 2 x 3