Answer:
$0. 20
Explanation:
emma had $2.40 but she spent $1.40 on 7 pencils
if she bought 7 pencils and had $1.00 left
so you would do $2.40 - $1.00 because she had $1.00 left after she bought the pencils.
the answer would be $1.40 because that is how much she spent and you divide that by 7 because she bought 7 pencils.
so 140 divided by 7 = 20
but since its $ dollars you put it into cents leaving you with the answer
$)0.20