Expressions
Write an expression for “a number plus 7.”
n + 7
1/2 + 1/2
1
A pencil costs 25¢. How much for 4 pencils?
$1
What is the perimeter of a rectangle with length 5 and width 3?
16 units
If x=3, what is 2x?
6
Simplify 4+6
10
Simplify 6/12
1/2
A square has sides of 6 units. What is its area?
36 square units
A triangle has a base of 8 units and height of 4 units. What is its area?
16 square units
If y=10, what is y−4?
6
Write an expression for “three times a number.”
3n
Product of 2/3 and 3/4
6/12 which simplifies to 1/2
A toy costs $18. It is on sale for $3 off. What is the sale price?
$15
A rectangular prism has length 2, width 3, and height 5. What is its volume?
30 cubic units
Write an equation: “Seven more than a number is 15.”
n+7=15
Simplify 2(n+5) when n=3
16
3/6 which simplifies to 1/2
A car drives 120 miles in 2 hours. What is its speed in miles per hour?
60 mph
A square has an area of 64 square units. What is the length of one side?
8 units
Solve: 5x=20
Write an expression for “ten more than twice a number,” then evaluate when the number is 6.
Expression = 2n+10; when n=6, value = 22
A recipe calls for 2/5 cup of oil. If you make 3 recipes, how much oil will you need in all?
6/5, which simplifies to 1 1/5 cups
A number is doubled, then 5 is added, and the result is 29. What was the number?
12
A rectangular garden has a length of 10 feet and width of 7 feet. What is the perimeter and the area?
Perimeter = 34 feet; Area = 70 square feet
Solve: 2x+3=11
x=4