Chapter 1
Evaluate the expression when a=6 and b=8.
4 + a
10
Estimate the product.
2 4/5 * 3/4
Estimate by rounding each factor to the nearest whole number.
6.3 * 7.5
48
21/25
84%
Simplify the expression.
3.1 + (8.6 + m)
11.7 + m
Multiply. Write the answer in simplest form.
9 * 1/4
2 1/4
Multiply.
0.4 * 0.7
0.28
Write the percent as a decimal.
25.7%
0.257
Use a formula to find the area of a square with side lengths 7m.
A = s2
A = 49 m2
Divide. Write the answer in simplest form.
1/6 / 1/3
1/2
Divide.
2.6 / 0.02
130
Tell which number is greater.
16/25, 65%
65%
The expression 15*x*6 represents the volume of a rectangular prism with a length of 15, a width of x, and a height of 6. Simplify the volume expression.
90x
You spend 2 1/2 hours online. You spend 1/5 of that time writing a blog. How long do you spend writing your blog.
1/2 hour
A grocery store sells grapes for $1.99 per pound. You buy 2.34 pounds of the grapes. How much did you pay?
$4.66
Find the percent of a number.
8% of 50
4
You make party favors for an event. You tie 9 inches of ribbon around each party favor. Write an expression for the amount of ribbon you need for n party favors. The ribbon costs $3 for each yard. Write an expression for the total cost of the ribbon.
9n
3(1/4 n)
You are in a car race. During a 10-second pit stop, the other cars gain 1/4 mile on you. How much would the other cars gain on you during a one-minute pit stop?
1 1/2 miles
Your class buys a cake for your teacher's birthday. The cake costs $34.50 and there are 25 students in your class. How much does each student pay?
$1.38
In a class of 20 students, 40% of students are boys. 25% of the boys and 50% of the girls wear glasses. How many students wear glasses?
8 students