math slide (unit 1)

rational numbers

• Integers - number that can be written with no decimals (whole #, 0, negative whole #)
• for example: 1, 9, 700000, -4
• rational number - can be written as a fraction of 2 integers
• for example: 1/3 , 2/5 , 4/10

How can we tell.....

• 
• 1. integers ( rewrite a fraction over 1)
• 2. fractions or mixed number integers (converted into improper fractions)
• 3. terminating decimals ( rewrite as fraction/ numeber w/o decimal)
• 4. repeating decimals (same as 3)

irrational numbers

• number that CANNOT be written as a fraction (of integers)
• non-repeating, non-terminating decimals
• pi is an irrational number
• square root of any non-perfect square is irrational

Folie 4