Number Sense
100 – What is the value of 72?
49
What is 1/2+1/4?
1/2+1/4=3/4
Write the ratio of 3 cats to 12 dogs.
Ratio: 3 : 12 (or simplified 1 : 4)
How many degrees are in a straight angle?
A straight angle = 180°
Evaluate: −5+12.
−5+12=7
Write 0.45 as a fraction in simplest form.
9/20
Convert 3.75 to a mixed number.
3.75 = 3 ¾
A recipe uses 2 cups of rice for every 3 cups of water. What is the ratio of rice to water?
Ratio of rice to water: 2 : 3
Name a polygon with 6 sides.
A 6‑sided polygon is a hexagon
Simplify: 3x+5x.
3x+5x=8x
Which integer is closest to −3.8?
Closest integer to –3.8 is –4
Subtract: 5/6−1/3.
5/6−1/3=3/6 or 1/2
If 4 pencils cost $2, how much do 10 pencils cost?
10 pencils cost $5
Find the area of a rectangle with length 8 cm and width 3 cm.
Area = 8×3=24 cm2
Solve: x−7=12.
x−7=12
x=19
Order these from least to greatest: 0.2, 1/4, 0.18.
Least to greatest: 0.18, 0.2, 1/4
Which is larger: 7/8 or 0.85?
Larger: 7/8
Solve: 3/x=9/12.
3/x=9/12
x=4
What is the circumference formula for a circle?
Circumference formula: C=2πr
Evaluate: 2(3−8).
2(3−8)=2(−5)=−10
A number is divisible by 3 and 9. What must be true about its digits?
The sum of the digits must be divisible by 9 (and also by 3)
Simplify: 24/36.
24/36=2/3
A map scale is 1 cm : 5 km. How many km does 7 cm represent?
7 cm represents 35 km
A triangle has angles 40° and 65°. What is the third angle?
Third angle: 180−(40+65)=75°
Expand: 4(x+3).
4(x+3)=4x+12