Rational Number Operations
-5 + 8 = ?
3
Is y = 3x proportional?
Yes
50% of 20 = ?
10
Area of a rectangle:
length 5 inches, width 3 inches
15 inches2
Solve: x + 5 = 12
x = 7
-6 × 4 = ?
Find the unit rate:
24 miles in 3 hours
8 miles per hour
Convert 0.25 to a percent
25%
Volume of a cube with side length of 4 feet
64 feet3
Solve: 3x = 18
x = 6
12 ÷ (-3) = ?
-4
Is this proportional?
(2,4), (3,6), (4,9)
No
What is 20% of 80?
16
Area of a triangle:
base 10 cm, height 6 cm
30 cm2
Solve: x - 4 = 9
x = 13
-3/4 + 1/2 = ?
-1/4
If y = 5x, what is y when x = 7?
35
A $50 item is on sale for 20% off. What is the discount?
$10
A rectangle is 8 inches by 5 inches. What is the perimeter?
26 inches
Solve: 2x + 3 = 11
x = 4
A temperature drops from 5°C to -7°C. What is the change?
-12
A recipe uses 2 cups of flour for 3 batches. How much for 9 batches?
6 cups
A price increases from $40 to $50. What is the percent increase?
25%
A composite figure is made of two rectangles:
Area 20 ft2 + Area 15ft2 = ?
35 ft2
Solve: 3(2x - 5) = 27
x = 7