Math Essentials: Evaluating/Interpreting Expressions Study Guide

What does "product" mean?

• Multiply
• Divide
• Add
• Subract

What does "difference" mean?

• add
• subtract 
• multiply
• divide

Which interpretation matches this expression:

(4 x 6) + 1

• The product of four and six, plus one

• The product of six and one, plus four

• The sum of six and four, times itself

• The product of four and one, times six

Which interpretation matches this expression:

[2 x (15 + 3)] ÷ 12

• Double the sum of 15 and 3, then divide by 12

• The sum of 2, 15, and 3, divided by 12

• The quotient of 12 doubled by the sum of 15 and 3

• The sum of 15 and 3 divided by 12, then doubled

a = the number of apples I bought

b = the number of bananas I bought

x = the cost of an apple in dollars

y = the cost of banana in dollars

What does the expression y=2x mean?

• Bananas cost twice as much as apples.

• Apples cost half as much as bananas.

• I bought 2 bananas.

• Bananas cost half as much as apples.

a = the number of apples I bought

b = the number of bananas I bought

x = the cost of an apple in dollars

y = the cost of banana in dollars

What does the expression y=(1/2)x?

• Bananas cost twice as much as apples.

• Apples cost half as much as bananas.

• I bought 2 bananas.

• Bananas cost half as much as apples.

a = the number of apples I bought

b = the number of bananas I bought

x = the cost of an apple in dollars

y = the cost of banana in dollars

What does the expression ax+by=5?

• The apples I bought cost $5.

• Altogether I bought 5 apples and bananas.

• I paid $5 for all the apples and bananas I bought.

• There are 5 times as many apples as bananas.

a = the number of apples I bought

b = the number of bananas I bought

x = the cost of an apple in dollars

y = the cost of banana in dollars

What does the expression b+a=5?

• The apples I bought cost $5.

• Altogether I bought 5 apples and bananas.

• I paid $5 for all the apples and bananas I bought.

• There are 5 times as many apples as bananas.

a = the number of apples I bought

b = the number of bananas I bought

x = the cost of an apple in dollars

y = the cost of banana in dollars

What does the expression y=2x mean?

• Bananas cost twice as much as apples.

• Apples cost half as much as bananas.

• I bought 2 bananas.

• Bananas cost half as much as apples.

a = the number of apples I bought

b = the number of bananas I bought

x = the cost of an apple in dollars

y = the cost of banana in dollars

What does the expression x=(1/2)y

• Bananas cost twice as much as apples.

• Apples cost half as much as bananas.

• I bought 2 bananas.

• Bananas cost half as much as apples.