Integers +, -, x, / Basics 10/25/09 Algebra 1.1 Bitsy Griffin

Integers Whole numbers and their opposites. Other vocabulary: Opposites 10/25/09 Algebra 1.1 Bitsy Griffin

Whole numbers and their opposites.

Other vocabulary:

Opposites

Essential Question: What is an integer? How does one work in a math sentence? 10/25/09 Algebra 1.1 Bitsy Griffin

What is an integer? How does one work in a math sentence?

Absolute Value Distance a # is from 0. Always positive. Read as: The absolute value of . . . |-6| 10/25/09 Algebra 1.1 Bitsy Griffin

Distance a # is from 0.

Always positive.

Read as:

The absolute value of . . .

|-6|

Adding #’s w/same sign: Add absolute values and tack on the sign. Adding #’s w/ op signs: Find difference of absolute values Take sign of number that “appears” larger 10/25/09 Algebra 1.1 Bitsy Griffin

Add absolute values and tack on the sign.

Adding #’s w/ op signs:

Find difference of absolute values

Take sign of number that “appears” larger

subtracting #’s Add the opposite of the second # 10/25/09 Algebra 1.1 Bitsy Griffin

Add the opposite of the second #

AV on Calculator 2 nd 0 takes you to the catalogue. abs is absolute value. Hit enter. Make sure you close the (). 10/25/09 Algebra 1.1 Bitsy Griffin

2 nd 0 takes you to the catalogue.

abs is absolute value.

Hit enter.

Make sure you close the ().

Multiply Positive Integers Multiply or Divide any number of terms Answer is always positive 10/25/09 Algebra 1.1 Bitsy Griffin

Multiply or Divide any number of terms

Answer is always positive

X or / Mixed or Negative Integers Multiply or divide an even number of negative integers Answer is always positive Multiply or divide an odd number of negative integers Answer is always negative 10/25/09 Algebra 1.1 Bitsy Griffin

Multiply or divide an even number of negative integers

Answer is always positive

Multiply or divide an odd number of negative integers

Answer is always negative

Caution Watch out for negative integers raised to powers -3^2 (-3)^2 -3^3 (-3)^3 10/25/09 Algebra 1.1 Bitsy Griffin

Watch out for negative integers raised to powers

-3^2

(-3)^2

-3^3

(-3)^3

Essential Question: What is an integer? How does one work in a math sentence? 10/25/09 Algebra 1.1 Bitsy Griffin

What is an integer? How does one work in a math sentence?