Question

(1.)LaVonne estimated 38% of 63 by rounding 38% up to 40%, rounding 63 up to 70, and then multiplying 70 by 0.4 to get 28. Is her estimate reasonable?
No, because she should have rounded 38% down to 30%.
No, because she should have rounded 63 down to 60.
Yes, because she correctly rounded 38% up to 40%.
Yes, because she correctly rounded 63 up to 70.
(2.)Which value is the best estimate of 26% of 259?
50
52
65
88
(3.)The Rodriguez family dined at a restaurant. Their bill came to $119 plus 9% sales tax. They also plan to leave a 22% tip on the price of the meal before tax.

Which is a reasonable estimate of the total amount they will pay?
$121
$132
$144
$156
(4.)Kurt and Maria’s high school is having a newspaper drive.The goal is to collect 3,585 pounds of newspapers. So far, 21% of the goal has been reached.

Kurt estimated the number of pounds of newspapers collected by finding 10% of 3,600 and then multiplying the result by 2.

Maria estimated the number of pounds of newspapers collected by finding One-fifth of 3,600.

Who is right, and why?
-Neither Kurt nor Maria is right, because 3,500 should be used instead of 3,600.
-Kurt is right, because finding One-fifth of 3,600 is not a good way to approximate 21% of 3,585.
-Maria is right, because finding 10% of 3,600 and multiplying the result by 2 is not a good way to approximate 21% of 3,585.
-Both Kurt and Maria are right, because 3,585 should be rounded up to 3,600, and 21% of this amount can be approximated by either finding 10% of 3,600 and multiplying the result by 2 or by finding One-fifth of 3,600.
(5.)Donna earns $1,404 per week at her job. However, 19% of her income gets taken out in taxes, and 12% of her income gets taken out and put into her retirement account.

Which is a reasonable estimate of the amount Donna is left with each week after the money is deducted?
$420
$980
$1,120
$1,260