Secondary Math Essentials Chapter 1.1

 Classify the following numbers using one or more of the following terms:  Natural Number  Whole Number  Integer  Rational Number  Irrational Number 6 0 Natural Number Whole Number Integer Rational Number Whole NumberInteger Rational Number Irrational Number

Adding? Move to the right Subtracting? Move to the left 6-8= -2+5=-6-2=

 Rules:  If the signs match, add numbers & keep the sign  Examples: ( - 3 ) + ( - 9 ) = ( - 1 ) + ( - 1 ) = = Write this rule in your notes!!! ( - 9 ) + ( - 1 ) = -6 – 2 = = -8 – 4 = -16 – 9 =

 Rules:  If the signs are different, subtract numbers & keep the sign of the bigger number  Examples: 3 + ( - 9 ) = ( - 1 ) + 1 = = Write this rule in your notes!!! 9 – 15 = = = = =

 Try these on your own using the rules we wrote in our notes: =7 – 8 = =-8 – 6 = -10 – 7=18 – 41 =

 Two negatives right in a row create a positive  Examples: Write this rule in your notes!!! (-1) – (-40) = – (-8) = 13 – (-29) = -8 – 4 = -10 – 15 =

 If the signs are the same:  If the signs are the different: add numbers & keep the sign subtract numbers & keep the sign of the bigger number Two negatives right in a row create a positive

 How many can you finish CORRECTLY in 2 minutes?  Graph results