Estimating and Rounding Solutions

Estimate the sum by rounding to the nearest dollar.

• $4.00

• $3.00

• $5.00

• $2.00

Round to the nearest ten and then find the estimated difference.

• 20

• 50

• 30

• 40

Round the number 8,219 to the nearest hundred.

• 8,200

• 8,210

• 8,220

• 8,300

Estimate the sum of the following numbers to the nearest thousand: 12,486 + 1,476 + 3,542 + 8,399

• 26,100

• 26,000

• 25,100

• 25,000

There are 293 steps to the top of the Leaning Tower of Pisa in Italy.  To the nearest hundred, about how many steps are there?

• 200

• 300

• 290

• 250

I climbed 125 feet on Tuesday and 376 feet on Wednesday. Which number sentence shows the best way to estimate the amount of feet I climbed on both days?

• 100+300=400

• 100+400=500

• 200+300=500

• 200+400=500

There are 367 students in third grade and 158 in fourth grade. About how many more students are in third grade than fourth? 

• 600

• 300

• 520

• 200

Round to the nearest hundred to estimate the sum of 432 + 348.

Hint: Stack your numbers!

• 600

• 700

• 800

• 900

John has 39 blue marbles and 483 red marbles. What would be the best estimate, to the nearest tens, for how many marbles John has all together?

• 520

• 510

• 500

• 530

Mark won a box of candy at the school picnic. The box had 457 pieces of candy in it. Rounded to the nearest hundred, about how many pieces of candy did Mark win?

• 460

• 450

• 400

• 500