Diana is buying seven avocados. Each avocado weighs 8 oz. How much will they cost her if avocados cost $2.00 a pound?

Question

I am working on operations with time and mixed units. The question is: Diana is buying seven avocados. Each avocado weighs 8 oz. How much will they cost her if avocados cost $2.00 a pound?

Answer 1

 (56 ounces) * (1lb/16 ounces ) * $2.00 = $ 7.00   /  Just one Algebraic statement solves the 

                                                                            Whole thing, convert ounces to pound,and

                                                                             then multiply the number of pounds by $2.00

                                                                             to get the total price./    

Answer 2

Hi Sierra;

Our first priority is to align the units.  The weight of each avocado is presented in ounces, the unit pricing is in $/pound.

Let's convert ounces to pounds.

(8 ounces)[(1 pound)/(16 ounces)]

Ounces is a unit in the numerator and denominator.  It cancels...

(8 ounces)[(1 pound)/(16 ounces)]

(8)[(1 pound)/16]

8/16 pounds

1/2 pound

 

(7 avocados)(1/2 pound)[($2.00)/(1 pound)]

The unit pound is in the numerator and denominator.  It cancels...

(7 avocado)(1/2 pound)[($2.00)/(1 pound)]

The only units remaining are $ for avocados.  This is what we want...

Now that all units are aligned, we may execute calculations...

$7.00 for avocados.