Answer
Estimated: Dollar 3
Exact: Dollar 4.14
Work Step by Step
Here
Joy spent dollars 1.59 for toothpaste, 5.33 for vitamins, 18.94 for toaster. To find balance we need to find the difference i.e. subtraction between amount paid and total expence.
First lets find estimate with front end rounding.
30 (rounds to) 30
1.59 (rounds to) 2
5.33 (rounds to) 5
18.94 (rounds to) 20
Total Expense is 2+5+20=27
Estimated dollars joey got back from clerk = 30 - 27 = 3
Now let's find the final exact answer
First find the total payment
1.59
+5.33
+18.94
______
25.86
Now lets find the exact dollars joey got back from clerk =
30.00
- 25.86
______
4.14
