Estimate sums and differences

Estimate by rounding to the nearest whole number.

52.761 + 4.240

Estimate by rounding to the nearest tenth.

46.75 +23.42

Estimate by rounding to the nearest ten.

37.42 +21.13

Estimate by rounding to the nearest hundredth.
6.549 + 1.702

Ms. Bimbo sent Ms. Tolu to the bookstore to buy a new science book. There were two contributions, $7.56 and $8.35, toward the purchase. About how much money does Ms. Tolu have?

The Nwulu family drove 900 mi the first day and 754 mi the second day of their family vacation. Estimate the difference in miles driven these two days by rounding to the nearest hundred.

Find the missing addend.

23 + c = 52

Find the missing addend.

142 + g = 207

The baggage-claim agent reported that 61 suitcases were loaded on the plane. There was space for 134 average-sized suitcases. How many more could be loaded on board?

Airline tickets for the McKain family vacation cost $2,350. Mr. McKain budgeted $4,000 for the family vacation. How much was left for the rest of the vacation?