Estimation to Add

Estimate the answer to:

906 + 397

• 1300

• 1200

• 1310

• 1303

Estimate the answer to:

578 + 720

• 1300

• 1200

• 1290

• 1298

Estimate the answer to:

1965 - 370

• 1600

• 1500

• 1595

• 2400

Estimating is to....

• find the exact answer

• find something close to the correct answer

• use an algorithm

When estimating 347+ 455 you should...

• Round both numbers to the nearest ten and add them mentally

• Line both numbers up and solve to find the answer

• Round both numbers to the nearest hundred and add them mentally

• Round both numbers to the nearest tenth and add them mentally

When estimating 1345+ 2789 you should...

• Round both numbers to the nearest ten and add them mentally

• Line both numbers up and solve to find the answer

• Round both numbers to the nearest hundred and add them mentally

• Round both numbers to the million and add them mentally

To approximate is to...

• Guess randomly

• Show that something is almost, but not completely, accurate or exact

• Use a proximity algorithm

• Solve exactly

Approximate... I ran 393m to my Grandpa's house, If i run back the total distance ran will be?

• 800m

• 600m

• 39.3m

• 750m

Estimate 359 + 481

• 360 + 480

• 350 + 450

• 300 + 500

• 400 + 600

Estimate 159 + 401

• 160 + 400

• 150 + 450

• 150 + 350

• 400 + 600