Approximation and Estimation

Estimating is to....

• find the exact answer

• find something close to the correct answer

• use an algorithm

When estimating 319 + 452 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 23.45+ 26.53 you should...

• Round both numbers to the nearest tenth 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

Estimate the cost.... I buy 3 pencils for £1.95 each.

• 3 x £2 = £6

• 3 x £1.50 = £3.50

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

Tags

CCSS.3.NBT.A.2

CCSS.3.OA.D.8

How many significant figures are there?

100.00

• 1

• 3

• 4

• 5

How many significant figures are there?

4004

• 1

• 2

• 3

• 4

What is 0.658 rounded to 1 significant figure?

• 0

• 0.66

• 0.7

• 0.6

Round 1289 to three significant figures

• 1290

• 130

• 1300

• 129