Addition and subtraction?

Question

a lady has a certain number of dollar bills in her purse.she has no other money.she spends half of the money on a hat and gives $1 to a beggar outside the store.she spends half the remaining dollars for lunch and tips the waiter $2.she then spends half the remaining dollars on a book,and just before she goes home she spends $3 on a hot fudge sundae.she now has $1 left.how many dollars did she began with?explain and show work

Answer 1

work from the bottom

(((1+3)*2+2)*2+1)*2 = 42

Answer 2

I worked it out back the front and got the same answer as the previous person named greg Yeah!!

Answer 3

$42, try working backwards...

$1 + $3 FOR THE SUNDAE = $4

Double it for the book she bought, $8

Ad $2 for the tip = $10 and double for lunch = $20

Add $1 for the beggar = $21 and double for the hat= $42

Answer 4

1 + 3= 4

4 x 2= 8

8 + 2= 10

10 x 2= 20

20 + 1 =21

21 x 2 = 42

SHe had 2 $20 and 2 $1.

I just basically worked backwards.