Chapter 3 Review

-5 + 5

= 0

9 + 2

= 11

Remember 17 + ( - 8) is equivalent to 17 – 8.

ǀ -10 ǀ - ǀ-2ǀ

10 - 2

= 8

Remember Absolute value is the distance from 0. No signs.

- ǀ - 2 ǀ

- 7 - 2 = -9

- ǀ - 7 ǀRemember Absolute value is the distance from 0. Signs OUTSIDE of absolute value bars STAY and count.

Remember…8 + ( - 7) Is equivalent to8 – 7

Steps:1. Multiply digits.2. Integers are the same sign so the product is POSITIVE.

= 42

Steps:1. Divide digits.2. Integers are the different signs so the quotient is NEGATIVE.

= 2

Steps:1. Multiply digits.2. Integers are the SAME signs so the quotient is POSITIVE.

= 9

-2 4 = -2

11. A turtle dives toward deeper water at a rate of 8 inches per second. It continues for a total of 16 seconds.

- 8 ( 1 6) = = - 128The turtle dives 128 feet down.

Has $26 = totalPays $5 = -5

26 - 5

= $21 Marissa has $21 left.

43 underground = - 43Climbs 14 feet up = +14

-43 + 14 = - 29 Louisa is now 29 feet underground.

14. The highest point in California is Mount Whitney at 14,494 feet above sea level. The lowest point in California is in Death Valley at 282 below sea level. What is the difference in elevation between these two points?

14,494 + 282 = 14,776 feet

15. An archaeologist descends 20 feet into a canyon and then climbs up 12 feet. What integer represents her final position relative to where she started?

descends 20 feet = -20 Climbs up 12 feet = +12

- 20 + 12 =

= - 8 feet

Steps:Add and keep sign.

= - 21

Steps:Additive Inverse.10 + 4

= 14

Steps:1. Multiply.2. Add.- 18 + -6

= - 24

Steps:1. Multiply.2. Add.+ 12- 5

20. The temperature at 7:00am was 6˚F. The temperature dropped 2 degrees every hour for 6 hours. What was the temperature at 1:00am?

Start at 6Dropped = - 2Every means “Multiply” 6 - 2 ( 6) =6 - 12 = -6

- 4 + 5 = 1

+ 3 - 7 = - 4+ 3 + - 7 = - 4

Total ÷ Groups = Size

- 9 3 3 ÷ =

Groups x Size = Total

4 x - 3 = -12

Steps:1. Add all snowfall.2. Add all snow melted.3. Subtract integers.

16 14 - = 2