Estimate Sums and Differences

Use compatible numbers to estimate the value of 76 + 26.

• 75 + 25 = 100.

• 80 + 30 = 110

• 76 + 26 = 102

• 70 + 20 = 90

Estimate to the thousands place.
38,674 + 83,102 =

• 122

• 122,000

• 120,000

• 121,776

Estimate to the ten thousands place.  
47,623 - 12,385 =

• 40

• 34,238

• 40,000

• 30,000

Estimate to the tens place.
37 + 42 + 43 =

• 100

• 110

• 120

• 122

Max goes to the store and gets a bag of chips for $1.29, sandwich for $4.99, and a giant cookie for $1.89.  About how much is his total? (Estimation)

• $6.00

• $7.00

• $8.00

• $9.00

Mr. Smith drove 1,380 miles in the month of August and 656 miles in the month of September. Approximately how many miles did he drive all together.

• 2,000.

• 2,100.

• 2,036.

• 2,500.

Ms. Chaney had $565.26 in her bank account. She spent $78.95 at TJ Maxx. Estimate how much money Ms. Chaney has left in her bank account.

• 486.31

• $500

• $490

• $480

If you have 382, you might say you have ABOUT...

• 400

• 390

• 450

• 350