Level 2
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Digits
numbers that make up other numbers (e.g. there are 10 digits 0-9)
Numbers
a digit or a collection of digits (e.g. 0, negative #s, fractions/decimals, square roots)
Negative #s
less than 0
Positive #s
greater than 0
Even Integers
divisible by 2; has a remainder of 0 when divided by 2 (e.g. -4, 0, +4)
Integer
an integer is even if its unit digit is even; an integer is odd if its unit is odd; counting #s (-6, 0, 6); not fractions
Odd Integers
not divisible by 2; have a remainder of 1 when divided by 2 (-3, +3)
Adding Integers
even+even=even (2+2=4); odd+odd=even (5+7=12); even+odd=odd (2+7=9)
Multiplying Integers
even(even)=even (e.g. 2(2)=4); odd(odd)=odd (e.g. 5(7)=35); even(odd)=even (e.g. 2(7)=14)
Consecutive Integers
integers listed in order (0,1,2,3,4...; ... -6,-5,-4,-3,-2,-1,0; 4,8,12,16); not consecutive fractions and decimals, only integers are consecutive!
Zero
is neutral; neither positive nor negative; an integer (not positive/negative); even; 0+x=x; 0(x)=0; you cannot divide by 0