Rational Numbers
What is 3.25 as a fraction in simplest form?
13/4
-5 + 3 = ?
-2
Simplify: 3x + 4x
7x
If 3 notebooks cost $6, how much do 5 notebooks cost?
$10
What’s the area of a rectangle with length 8 and width 5?
40 units²
Which is greater: -2.5 or -3.1?
-2.5
What’s |-7|?
7
Evaluate: 2a + 3 when a = 4
11
Is 8/12 equivalent to 2/3?
yes
Define a trapezoid.
A quadrilateral with one pair of parallel sides
Order from least to greatest: 1/2, -0.7, 0.3
-0.7, 0.3, 1/2
-4 – (-9) = ?
5
Solve: x – 5 = 13
x = 18
Solve: x/4 = 3/2
x = 6
Area of triangle: base = 6, height = 4
1/2 * 6 * 4 = 12
What is -3 ¾ as a decimal?
-3.75
-6 × 3 = ?
-18
Factor: 4x + 8
4(x+2)
A recipe uses 2 cups of rice for 5 people. How many cups for 15 people?
6 cups
Find the area of a circle with diameter of 6 (use π ≈ 3.14)
≈ 28.26 units²
Is √49 rational or irrational? Explain why.
Rational. 7
Evaluate: (-4)² – 12 = ?
4
Write an expression for: “6 more than 5 times x”
5x + 6
A car travels 180 miles in 3 hours. What is the unit rate (mph)?
60 mph
A cube has edge length 4. What is its volume?
64