you wish to mentally estimate the total cost of items that have the following price: $1.85, $.98, $3.49, $9.78, and $6.18. Rounding off the items to the nearest half-dollar, your estimate of the total cost of these items is

Answer: Your estimate of the total cost of these item is $22.5

Solution:

Rounding off the items to the nearest half-dolar:

$1.85 is between $1.5 and $2.0, but nearest to $2.0

$0.98 is between $0.5 and $1.0, but nearest to $1.0

$3.49 is between $3.0 and $3.5, but nearest to $3.5

$9.78 is between $9.5 and $10.0, but nearest to $10.0

$6.18 is between $6.0 and $6.5, but nearest to $6.0

The estimate of the total cost of these items is:

$2.0+$1.0+$3.5+$10.0+$6.0=$22.5