Megan has 45.12$ in her purse she spends 7.89 for lunch and 21.25$ for a pair of sunglasses.Which is the best estimate for the amount of money Megan had left?

12$
16$
20$
24$

1 answer

To find the best estimate for the amount of money Megan has left after her purchases, first, we can round the amounts she spent and the amount she had initially:

  • Megan's initial amount: $45.12 is approximately $45.
  • Amount spent on lunch: $7.89 is approximately $8.
  • Amount spent on sunglasses: $21.25 is approximately $21.

Now, we can subtract the rounded amounts:

Initial amount: $45
Total spent: $8 + $21 = $29

Now, subtract the total spent from the initial amount:

$45 - $29 = $16

So the best estimate for the amount of money Megan had left is approximately $16.