Question

math question down below

Answer 1

(a)
3
1
5
2
3
9
1
-1
-1
Total: 22

(b) The actual total is $21.77 which rounds to $22, the same as the estimate, so the estimate is reasonable.

Answer 2

You are to round off all the dollar amounts given, and then to estimate the total bill using these rounded off figures.

So:  add up $3, $1, $5, $2, $3, $9, $1, -$1, -$1

Compare your result to the register sum, $21.77.

How close was your estimate to $21.77?  Justify your answer.