Adding and Subtracting Rational Numbers
What is the absolute value of -10?
10
-2(8)
-16
Simplify the expression:
12g + 9g
21g
Solve:
x - 5.2 = -18.73
x = -13.53
Find the unit rate.
$4.80 for 6 cans
$0.80 per can
9
-49 / (-7)
7
2/5 y - 4 + 7 - 9/10 y
-1/2 y + 3
-4/9 x = -3
x = 6 3/4
Tell whether the rates are equivalent:
75 pounds per 1.5 years
38.4 ounces per 0.75 year
No.
50 lb per year and 51.2 lb per year
-7 - (-8)
1
Write the fraction or mixed number as a decimal:
-1 5/6
-1.83
Find the sum of each expression:
(n + 8) + (n - 12)
2n - 4
-3y < -14
y > 4 2/3
Tell whether the ratios form a proportion.
21/2: 3 and 16:6
No
2 4/5 + (-12/15)
2
5/6 (-4 1/2) (-2 1/5)
8 1/4
Find the difference of the expression:
(-2g + 7) - (g + 11)
-3g - 4
Solve:
7.3y - 5.18 = -51.9
x = -6.4
Solve the proportion.
20/16 = x/12
x = 15
-4 14/15
(-10 2/7) / (-4 4/11)
2 5/14
Simplify the expression
-3/4 (5x - 12) + 2 (8 - 1/4x)
-4 1/4x + 25
-3.2 (c - 4.3) < 20
c > -1.95
There are 180 white lockers in a school. There are 3 white lockers for every 5 blue lockers. How many lockers are in the school?
480 lockers