Louise is estimating the cost of the groceries in her cart. She rounds the cost of every item to the nearest dollar to form her calculations. If an item costs $1.45, to what amount will Louise round the item?

$1.45 is rounded to $1.00. You are rounding to the ones place, so look at the place to the right (the tenths place) to choose whether to round up or stay the similar. Since 4 is less than 5, the 1 stays the similar and the places after the 1 become zero.