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# THE NUMBER LINE 0123456789-9-8-7-6-5-4-3-2 zero – neither (+) or (-) negative numberspositive numbers.

## Presentation on theme: "THE NUMBER LINE 0123456789-9-8-7-6-5-4-3-2 zero – neither (+) or (-) negative numberspositive numbers."— Presentation transcript:

THE NUMBER LINE 0123456789-9-8-7-6-5-4-3-2 zero – neither (+) or (-) negative numberspositive numbers

a) Name the integer that describes each situation - A gain in weight of 7 pounds - 10 degrees below zero + 7 - 10

b) Name the coordinates of the points graphed. 0123456789-9-8-7-6-5-4-3-2 CA T -7 0 4

c) Insert the appropriate inequality symbol to make each statement true. 0123456789-9-8-7-6-5-4-3-2 -5 2-3 -1 4 -6 <<>?? ?

Have you ever played rummy? Have you ever played solitaire on the computer?

- 4 + - 9 =- 13

+ + “Neutral Pairs”

++++ -3 + 4 =1

– 8 10 = Change (sign) - Keep Change (operation) + ++++++++ - 2 Use “keep-change- change” ~ only to change subtraction to addition.

- 9 ( 4) + 2 = – - + Keep Change (operation) Change (sign) + ++++ - 3 ++ “Hey, have you ever heard of a double negative in English class?”

A football team made the following yardage on five plays: lost 4, gained 16, gained 9, lost 8, and lost 4. What was the net yardage on the 5 plays? - 4 + 16 + 9 – 8 – 4= - 4 + 16 + 9 + - 8 + - 4 If you like “keep change change” = 12 + 9 + - 8 + - 4 = 21 + - 8 + - 4= 13 + - 4= + 9 Click here for visual tiles

What are all of the rules?! (+)(+) = (+) (+)(-) = (-) (-)(+) = (-) (-)(-) = (+)

124(3) = means “4 groups of 3” ++ + ++ + ++ + ++ + Group 1Group 2Group 3Group 4

5(-4) = Group 1Group 2Group 3 Group 4Group 5 -20 means “5 groups of -4”

Why is a negative # times a negative # equal to a positive #? 3(-4) = -12 2(-4) = - 8 1(-4) = - 4 0(-4) = 0 -1(-4) = 4 3(4) = 12 2(4) = 8 1(4) = 4 0(4) = 0 -1(4) = -4 -2(4) = -8-2(-4) = 8 ? ?

A diver descended a total of 60 feet in 5 equal segments. What integer describes each of his descents? - 60 He “descended.” i.e. below sea level ÷ 5 = -12 Describe what this integer means

WORKSHEET: # 1 – 30

- 4 + 16 + 9 – 8 – 4 =- 4 + 16 + 9 + - 8 + - 4 +++++++++ +++++++ +++++++++ Back to Slide Show = 9

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