Estimating

​Estimating or ROUNDING

Multiple Choice

When you estimate, are you looking for the exact amount or a reasonable amount?

• exact
• reasonable

Multiple Choice

Estimate the answer to: 
2.5 x 3 

• 9
• 12
• 6
• 99

Multiple Choice

Estimate the SUM:
9.1 + 7.5

• 15
• 16.6

• 18
• 2

Multiple Choice

What estimates would you give in order to make a calculation to

806 - 409

• 810 = 410 =

• 800 - 400 =

• 805 - 405 =

• 800 - 410 =

Multiple Choice

What estimates would you give in order to make a calculation to

5.1 x 9

• 5.1 x 10 =

• 5 x 10 =

• 5 x 9 =

Multiple Choice

What estimates would you give in order to make a calculation to

644 x 11 =

• 640 x 10 =

• 650 x 10 =

• 600 x 10 =

Multiple Choice

What estimates would you give in order to make a calculation to

44 x 0.6

• 40 x 1 =

• 45 x 0.5 =

• 40 x 0.5 =

Multiple Choice

What estimates would you give in order to make a calculation to

503 . 926 + 709.328

• 503 + 709 =

• 504 + 709 =

• 500 + 700 =

Multiple Choice

What estimates would you give in order to make a calculation to

290 x 9

• 300 x 10 =

• 290 x 10 =

• 200 x 10 =

Multiple Select

What estimates would you give in order to make a calculation to

511 x 2.1 =

• 510 x 10 =

• 500 x 2 =

• 510 x 2 =

Multiple Select

What estimates would you give in order to make a calculation to

51.4328963 $$\div$$ 2.1 =

• 51 $$\div$$ 2 =

• 50 $$\div$$ 2 =

• 50 $$\div$$ 10 =

Multiple Choice

What estimates would you give in order to make a calculation to

45 x 4.9 =

• 40 x 10 =

• 40 x 5 =

• 50 x 5 =

• 50 x 10 =

Multiple Select

What estimates would you give in order to make a calculation to

99.86754 x 0.54682 =

• 99 x 1 =

• 100 x 1 =

• 90 x 0.5 =

• 100 x 0.5 =

Multiple Choice

Tammy, Kelley, and Jim love reading books. Tammy read 7.75 hours last month. Kelley read 7.69 hours. Jim read 7.075 hours. Who spent the most time reading?

• Tammy

• Kelley

• Jim

• Tammy and Jim

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 3000 ÷ 30

• 2000 ÷ 30

• 3000 ÷ 33

• 2700 ÷ 33

Multiple Choice

There are 293 steps to the top of the Leaning Tower of Pisa in Italy.  To the nearest hundred, about how many steps are there?

• 200
• 300
• 290
• 250

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 5800 ÷ 60

• 5800 ÷ 62

• 6000 ÷ 60

• 6000 ÷ 62

Multiple Choice

Tyler says 753 rounds to 800.  Alexis says 753 rounds to 750.  Who is correct?

• Tyler
• Alexis
• Both of them are right, it depends on whether you are rounding to the nearest ten or hundred
• Niether of them are right

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 4000 ÷ 21

• 4000 ÷ 20

• 4200 ÷ 22

• 4250 ÷ 20

Multiple Choice

Round 0.44 to 1 decimal place.

• 0.44

• 0.5

• 0.45

• 0.4

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 7200 ÷ 81

• 7200 ÷ 80

• 7300 ÷ 81

• 7300 ÷ 80

Multiple Choice

Round 1.823 to the nearest whole number.

• 1

• 1.8

• 2

• 2.8

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 800 ÷ 9

• 840 ÷ 9

• 810 ÷ 9

• 830 ÷ 9

Multiple Choice

What is 999 rounded to the nearest 10

• 999

• 990

• 1,090

• 1,000

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 490 ÷ 7

• 500 ÷ 7

• 480 ÷ 7

• 450 ÷ 7

Multiple Choice

Estimate the answer

297 ÷ 3

• 100

• 50

• 200

• 0

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 630 ÷ 8

• 640 ÷ 8

• 610 ÷ 8

• 600 ÷ 8

Multiple Choice

Estimate the answer

214 ÷ 3

• 70

• 7

• 200

• 0

Multiple Choice

Estimate the answer

1,175 ÷ 4

• 300

• 3

• 250

• 0

Multiple Choice

Estimate the answer

637 ÷ 8

• 80

• 8

• 200

• 4

Multiple Choice

What is the best way to change these numbers to make them FRIENDLY for estimation?

• 360 ÷ 4

• 350 ÷ 4

• 340 ÷ 4

• 400 ÷ 4

Multiple Choice

Estimate the answer

3,619 ÷ 6

• 600

• 60

• 200

• 41

Multiple Choice

Estimate the product:

4,280 x 2

• 5,000

• 7,000

• 8,000

• 6,000

Multiple Choice

Estimate the product:

32 x 16

• 1,000

• 800

• 700

• 600

Multiple Choice

Estimate the product:

28 x 25

• 900

• 800

• 700

• 600

Multiple Choice

Estimate the product:

123 x 6

• 400

• 500

• 600

• 700

Multiple Choice

Estimate the product:

4,555 x 3

• 14,000

• 16,000

• 13,000

• 15,000