Choosing Best Estimate Metric

Look at the picture and choose the best sentence to describe what you see.

• There is a bit more than 700 ml.

• There is exactly 700 ml.

• There is a bit less than 700 ml.

Which unit would you use to measure the length of an ant?

• millimeters

• centimeters

• meters

• kilometers

Which unit would you use to measure the height of a building?

• millimeters

• centimeters

• meters

• kilometers

Estimate the answer to:

906 + 397

• 1300

• 1200

• 1310

• 1303

Estimate the answer to:

578 + 720

• 1300

• 1200

• 1290

• 1298

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

Estimate 359 + 481

• 360 + 480

• 350 + 450

• 300 + 500

• 400 + 600

Estimate  24 + 67

• 910

• 80

• 95

• 90

Estimate the answer to:

50.6 - 5.25

• 46

• 45

• 55

• 56

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