CHAPTER 2 TEST REVIEW

> GREATER THAN < LESS THAN INEQUALITY SYMBOLS: Comparing integers: INEQUALITY SYMBOLS: > GREATER THAN < LESS THAN

Examples: 12 □ -15 -34 □ -16 123 □ 125 54 □ 49 13 □ -13 46 □ 45 The humidity yesterday was 83% and today its 75%. Write an inequality statement for the humidity.

Order integers: Given a set of integers, put them in order from least to greatest. 1. {9,3,5,1,0,12,8} 2. {-4,-12,0,-56,-23,-1} 3. {12,-9,10,4,-3,-7,0}

Absolute value: Absolute value is the distance a point is from zero on a number line. Symbols 78 2. -13 3. -123 4. -9 + -12 11 − -20 3 -5

ADDING INTEGERS: GOAL: ADD TWO INTEGERS AND ADD MORE THAN TWO INTEGERS ADDING TWO OR MORE POSITIVE INTEGERS: 34 + 12 18 + 11 47 + 70 123 + 62 17 + 14 + 35 98 + 145 + 23 42 + 75 + 63

-34 + (-12) -45 + (-13) -107 + (-50) -63 + (-44) -54 + (-83) + (-100) ADDING TWO OR MORE NEGATIVE INTEGERS -34 + (-12) -45 + (-13) -107 + (-50) -63 + (-44) -54 + (-83) + (-100) -39 + (-90) + (-7) -46 + (-28) + (-34)

-56 + 12 34 + (-27) 45 + (-19) -89 + 72 12 + (-23) + (-42) ADDING TWO OR MORE POSITIVE AND NEGATIVE INTEGERS -56 + 12 34 + (-27) 45 + (-19) -89 + 72 12 + (-23) + (-42) 83 + (-26) + 21 -39 + 29 + (-25)

SUBTRACTING INTEGERS: GOAL: SUBTRACT INTEGERS AND EVALUATE EXPRESSIONS CONTAINING VARIABLES EXAMPLES: 34 – 67 56 – 19 123 – 90 23 – 87 -76 – 77 -18 – 18 -38 – 54 -23 – 12

WATCH OUT FOR THE DOUBLE NEGATIVES!!!! EXAMPLES: -34 – (-23) 43 – (-61) -73 – (-100) -19 – (-82) 56 – (-21) 29 – (-13) 39 – (-14) -45 – (-17) WATCH OUT FOR THE DOUBLE NEGATIVES!!!!

If a = -11 , b = 8 and c= -6 evaluate each expression: c – a – b b – a + c c + b – a a – b + 14

WORD PROBLEMS: The Bears scored 3 points in the first quarter, 14 points in the second quarter, 10 points in the third quarter, and 6 points in the fourth quarter. how many points did the Bears score for the game? 2. You enter an elevator on the 15th floor. You go down 9 floors. You then go up 18 floors, then down 5 floors. What floor do you end up on? 3. The NASDAQ went down 7 points on Monday, up 12 on Tuesday, down 5 on Wednesday, down 16 on Thursday, and up 8 on Friday. What was the total change for the week?

MULTIPLYING INTEGERS: GOAL: MULTIPLY INTEGERS AND SIMPLIFY ALGEBRAIC EXPRESSIONS

Multiplying Integers with the Same Sign: 15(8) 30(4) 56(5) 90(8) 14(6) -23(-3) -19(-7) -47(-3) -100(-10) -63(-3)

Multiplying Two Integers with Different Signs: 12(-3) 10(-23) 52(-2) 15(-7) 25(-8) -13(3) -45(2) -100(9) 35(-4) 19(-5)

Simplifying Algebraic Expressions: 7(-6q) 9(-12y) -3(-9x) 5a(6b) -4x(-5y) 10a(9b)(2c)

Evaluate each expression if a = -5, b = 2 and c = -10

DIVIDING INTEGERS: GOAL: DIVIDE INTEGERS AND FIND THE AVERAGE

DIVIDING INTEGERS WITH THE SAME SIGN: 27 ÷ 9 36 ÷ 12 -45 ÷ (-3) -20 ÷ (-4) -63 ÷ (-9) 78 ÷ 2 144 ÷ 12 -99 ÷ (-9) -75 ÷ (-5) 88 ÷ 8

DIVIDING INTEGERS WITH DIFFERENT SIGNS: 76 ÷ (-2) 84 ÷ (-3) -121 ÷ 11 -45 ÷ 15 100 ÷ (-25) -56 ÷ 8 72 ÷ (-9) 2000 ÷ (-100) 170 ÷ (-17) -48 ÷ 6

FINDING THE MEAN Division is used in statistics to find the average, or the mean, of a set of data. To find the mean of a set of data, find the sum of the numbers and then divide by the number in the set 84, 90, 89, 93 -2, 8, 5, -9, -12, -2

Graphing: {(5,2);(-3,6);(-1,-5);(0,4);(4,0);(-3,6);(1,1)}

FIND THE COODINATES FOR EACH POINT: B C D E

HOMEWORK PAGE 90-91 {1-43}