Sara believes if she spends $14 and then puts $14 into her account she will have $1 left over

Question

Sara believes if she spends $14 and then puts $14 into her account she will have $1 left over. Correct Sara by citing the property AND illustrating on a number line

Answer 1

The additive inverse property states that given a number a, then a + (-a) = 0

 

Spending $14 is the equivalent of -a (because Sara is decreasing the amount of money she has), and placing $14 into her account is the equivalent of positive a (because she is adding money to her account).

 

On the number line, both -14 and 14 are equidistant from 0.