Question

Another stack of books is 43 inches tall. Each book is 1/2 inch thick. Write an expression that represents the number of books in the stack

Answer 1

Answer:

86 books

Step-by-step explanation:

A stack of books is 43 inches tall.

Each book is $\frac{1}{2}$ inch thick.

To find the number of books in tha stack, divide the height of the stack by the height of the book:

$43:\dfrac{1}{2}$

The division by the fraction $\frac{1}{2}$ is equivalent to the multiplication by the fraction $\frac{2}{1},$ so

$43:\dfrac{1}{2}=43\cdot \dfrac{2}{1}=43\cdot 2=86$