Estimate the result by first rounding each number to the nearest unit.

Estimate the product by rounding each factor to the nearest unit, then multiplying.

Estimate the product by rounding each factor to the nearest hundred, then multiplying.

Melissa is trying to come up with a reasonable estimate of the amount she spent on groceries over the last six months. She notices that the six checks she wrote out to the local grocery store are in the following amounts: $187.54, $218.89, $174.74, $104.76, $189.75, and $228.64. By estimating each of the amounts of the checks to the nearest ten dollars, come up with a reasonable estimate for Melissa's total expenditure for groceries.

Evan wants to tip approximately on a restaurant tab. Which of the following comes closest to what he should leave?

Estimate the result by first rounding each number to the nearest unit.

Estimate the product by rounding each factor to the nearest unit, then multiplying.

If the number is rounded to the nearest hundredth, which of the following expressions would be equal to that value?