Question

Sandra buys 70 pencils with fuzzy tops. She gives 4 to each of her 15 classmates. The expression for the number of pencils she has left is 70 – (4 • 15). Answer each question to identify the parts of the expression.

1. In this expression, what does 70 represent?

2. What does (4 • 15) represent?
3. Is the expression 70 – (4 • 15) a difference of three terms, a product of two terms, or a difference of two terms? Identify the terms in the expression.

Answer 1

70 represents the initial number of pencils Sandra bought. (4 • 15) represents the number of pencils given to her classmates. The expression is a difference of two terms: 70 and (4 • 15).

Step-by-step explanation:

1. In this expression, 70 represents the total number of pencils Sandra initially bought.

2. (4 • 15) represents the total number of pencils she gave to her classmates, which is 4 pencils per classmate multiplied by 15 classmates.

3. The expression 70 – (4 • 15) is a difference of two terms. The terms in the expression are 70, which represents the initial number of pencils, and (4 • 15), which represents the number of pencils given to her classmates.

Answer 2

70 represents the # of pencils

(4*15) = represents the amount of pencils she gives away

the expression is a difference of 3 terms.

Term 1: 70

Term 2: -(the negative sign)

Term 3: (4*15)

Step-by-step explanation: