Answer
Estimated: Dollar 30 is new bank balance
Exact : Dollar 15.8 is new bank balance
Work Step by Step
Here
Jasmin started with dollars 406, she paid dollars 315.53 to day care and dollars 74.67 at grocery store. To find balance we need to find the difference i.e. subtraction.
First lets find estimate with front end rounding.
406 (rounds to) 400
315.53 (rounds to) 300
74.67 (rounds to) 70
Estimated new bank balance : 400 - 300 - 70 = 30
Now let's find the final exact answer
406
-315.53
____
90.47
90.47
-74.67
______
15.8
