Fluently Adding and Subtracting Three-Digit Whole Numbers

Estimate to the tens place to find the difference between

588 - 177

• 410

• 411

• 300

• 400

382 - 200 =

• 182

• 243

• 183

• 342

Estimate: 862 - 524

Estimate the difference by rounding to the nearest hundred.

839 - 576

Estimate the difference of 412 - 257 by rounding to the nearest hundreds

• 250

• 150

• 200

• 100

Round to the nearest 10, then estimate:
642 − 137

• 510

• 500

• 780

• 515

2. Estimate the sum: 123 + 456

• 580

• 650

• 500

• 600

Betsy the silly cow ate 487 blades of grass yesterday and 862 blades of grass today. Estimate the total blades of grass that Betsy ate by rounding each number to the nearest ten.

• 1,350

• 1,300

• 1,360

• 1,400

Sum of 178 and 69 to nearest hundred is

• 300

• 100

• 350

• 200

What is the best estimate of 123 + 143 to the nearest 10?

• 150

• 260

• 270

• 180