tuesday #1:

Tuesday #1:

Which of the following sentences does not belong with the other three.

a. b.

c. d. 2 2n n 1 1a a

12 12x x 7 7n n

Tuesday #2:

Which expression is equivalent to 4 + 6(ac + 2b) + 2ac?

a. 4 + 8ac + 12b b. 4 + 10ab + 2ac

c. 4 + 12abc + 2ac d. 12ac + 20b

ON TARGET

CLASSIFYING NUMBERSSection 2-1

ON TARGET

Classifying NumbersNatural Numbers- The set of counting numbers- 1, 2, 3, 4, …

Whole Numbers- The set of counting numbers and zero- 0, 1, 2, 3, 4, …

ON TARGET

Classifying NumbersIntegers- The whole numbers and their opposites- … -4, -3, -2, -1, 0, 1, 2, 3, 4, …

ON TARGET

THE NUMBER LINESection 2-1

ON TARGET

Number Line Examples

{integers}

{natural numbers}

ON TARGET

Number Line Examples

{rational numbers between -2 and 3}

{integers less than 2}

ON TARGET

YOUR TURN

ON TARGET

Guided Practice

GP 1 {-2, 0, 2, 4}

GP 2 {-3, -1.5, 0, 1.5, 3}

ON TARGET

Guided Practice

GP 3 {½, pi}

ON TARGET

ABSOLUTE VALUESection 2-3

ON TARGET

Absolute ValueThe distance from zero on a number line. Absolute value is always positive.

Examples: l -3 l = 3l 4 l = 4

ON TARGET

Absolute ValueTreat the absolute value brackets like parentheses. Simplify the inside first, then take the absolute value.GP 4 Evaluate l 10 – 2 lGP 5 Evaluate l -2 - 10 lGP 6 Evaluate - l -3 l

ON TARGET

INTEGERSSection 2-1 and 2-3

ON TARGET

Adding and Subtracting Integers

• Clean up the signs first!-7 – (-10)-7 + 10

Now use rules

ON TARGET

Adding and Subtracting Integers

• Clean up the signs first!• If the signs are the same, add the

numbers and keep the sign.• If signs are different, subtract the

numbers and keep the sign of the LARGER digit.

ON TARGET

YOUR TURN

ON TARGET

Guided Practice

GP 7 -4 + -5 = GP 8 -7 + 12 = GP 9 15 - -4 =

-9519

ON TARGET

RATIONAL NUMBERSSection 2-4 and 2.5

ON TARGET

Rational Numbers- Any number that can be written

as a fraction (includes repeating and terminating decimals).

- Examples: ¾, -2, 15, 0.75, 3.8

ON TARGET

Adding and Subtracting Rational Numbers

• Clean up the signs first!• If the signs are the same, add the

numbers and keep the sign.• If signs are different, subtract the

numbers and keep the sign of the LARGER digit.

Same Rules as In

tegers

ON TARGET

YOUR TURN

ON TARGET

Guided Practice

GP 10 5/8 + (-1/12) = GP 11 -0.005 + 0.0043 =

GP 12 3/8 – (-1/8) =

13/24

-0.00071/2

ON TARGET Assignments:2-3 Study Guide ODDS2-5 Study Guide # 7 – 16

Ch 1 Target Assessment--due by end of class

Download all Study Guides for Ch 2 (under Obj 1b Matrices)