Rational Numbers
A worker in a silver mine descends 36 feet. Use an integer to represent the change in the worker's position.
-36
Complete the statement below. The sum of 2 negative numbers is always_________________.
negative
Use a number line model to find −3+6. Solve the expression
Find the sum. (7/11)+(−1/11)
6/11
Decide if the expression describes a sum that is positive, negative, or zero. 3.7+ (−9.9)
Negative
Which of these situations can be represented by the opposite of −77? You walk down 77 flights of stairs. You climb up 77 flights of stairs. The temperature drops 77°F. You spend $7 on a book.
You climb up 77 flights of stairs.
What are additive inverses?
a pair of numbers with a sum of zero
Find the value of the expression. 9+(-3)
6
Daily Double!!!
(-1/3) + 3/5
4/15
Two submarines are underwater. The number −4,451 represents Submarine A's position (in feet) relative to the surface. The number −4,979 represents Submarine B's position (in feet) relative to the surface. Which submarine is closer to the surface?
Submarine A
a pair of numbers that are the same distance from 0
Find −7+(−9).
-16
Find (−1/3)+(-5/6)
-1 and 1/6
Which of these situations can be represented by the opposite of 66? . Andrew spent $66. The temperature was 66°F.
Andrew spent $66
Suppose a deep sea diver dives from the surface to 83 feet below the surface. He then dives down 11 more feet. What is the diver's present depth?
-94 or 94 feet below the surface
-12 + 22
10
In her garden Pam plants the seed 4 1/2 in. below the ground. After one month the tomato plant has grown a total of 9 3/4 in. How many inches is the plant above the ground?
5 1/4
Find the sum. 10.43+(−2.5)
7.93
What is the absolute value?
the distance number is from zero
A car backs up 17 feet, then moves forward 11 feet. The car's position can be represented by the sum −17+11. Find the sum.
-6
-2 + (-12) + 34
20
Simplify the expression. (2/3)+(1/9) + (-5/6)
-1/18
Find the sum. 1/2 + (-2.4) + 3/4 + (-3.8)
-4.95 or -4 and 19/20