If cookies cost $2.40 each, which equation can be used to determine how many cookies can be purchased with $40?

Answer 1

40/2.5 = 16 cookies for $40 at $2.50 each

use a calculator or

40/2.5 = 40/(2 1/2) = 40/(5/2) = 40(2/5) = 8(2) = 16

or 40/2.5 = 400/25 = 4(100)/25 = 4(100/25) = 4(4) = 16

or just do long division 25 goes into 40 once with remainder of 15

25 goes into 150 6 times, 16 with no remainder. Just keep track of

the decimal point.

If they cost $2 each you could buy 40/2 = 20

if they cost $3 each you could buy 40/3 = 13 1/3. For $2.50 it's

about half way between 13 and 20 or about 16