chapter 2 review. using mental math, solve the following: 25,000 x 20 = ?

Chapter 2 ReviewChapter 2 Review

Using Mental Math, Using Mental Math, solve the following:solve the following:

25,000 x 20 = ?25,000 x 20 = ?

Using Mental Math, solve Using Mental Math, solve the following:the following:

25,000 x 20 = 25,000 x 20 = 500,000500,000


50 x 3,000 = ?50 x 3,000 = ?


50 x 3,000 = 50 x 3,000 = 150,000150,000

Complete the Pattern:Complete the Pattern:

6 x 7 = 426 x 7 = 426 x 70 = 4206 x 70 = 420

6 x 700 = _____6 x 700 = _____6 x 7,000 = ______6 x 7,000 = ______


6 x 7 = 426 x 7 = 426 x 70 = 4206 x 70 = 420

6 x 700 = 6 x 700 = 4,2004,2006 x 7,000 = 6 x 7,000 = 42,00042,000


8 x 3 = 248 x 3 = 24 80 x 30 = 2,400 80 x 30 = 2,400800 x 300 = _____800 x 300 = _____

8,000 x 3,000 = ______8,000 x 3,000 = ______


8 x 3 = 248 x 3 = 24 80 x 30 = 2,400 80 x 30 = 2,400

800 x 300 = 800 x 300 = 240,000240,0008,000 x 3,000 = 8,000 x 3,000 =

24,000,00024,000,000

Estimate by Estimate by RoundingRounding::

1,119 x 87 = ________1,119 x 87 = ________


1,119 x 87 = ______1,119 x 87 = ______

1,000 x 90 = 90,0001,000 x 90 = 90,000


612 x 28 = ________612 x 28 = ________


612 x 28 = ______612 x 28 = ______

600 x 30 = 18,000600 x 30 = 18,000

Estimate by using Estimate by using Expanded FormExpanded Form::

7 x 632 = ________7 x 632 = ________

Estimate by using Estimate by using Expanded Expanded FormForm::

7 x 632 = ________7 x 632 = ________

7 x (600 + 30 + 2) =7 x (600 + 30 + 2) =4,2004,200

210 210 1414 4,424 4,424

Estimate by using Estimate by using Expanded FormExpanded Form::

50 x 769 = ________50 x 769 = ________

Estimate by using Estimate by using Expanded Expanded FormForm::

50 x 769 = ________50 x 769 = ________

50 x (700 + 60 + 9) = 50 x (700 + 60 + 9) = 35,00035,000

3,000 3,000 450450 38,450 38,450

Choose the Choose the Best Best MethodMethod. Then Multiply:. Then Multiply:

7,478 x 3 = 7,478 x 3 =

Choose the Choose the Best MethodBest Method. . Then Multiply:Then Multiply:

7,478 x 3 = 7,478 x 3 =

(P) 22,434(P) 22,434


366 x 42 = 366 x 42 =


366 x 42 = 366 x 42 =

(P) 15,372(P) 15,372


612 x 27 = 612 x 27 =


612 x 27 = 612 x 27 =

(P) 16,524(P) 16,524


2 x 100 x 330 = 2 x 100 x 330 =


2 x 100 x 330 = 2 x 100 x 330 =

(M) 66,000(M) 66,000


967 x 543 = 967 x 543 =


967 x 543 = 967 x 543 =

(P / C) 525,081(P / C) 525,081


234 x 876 = 234 x 876 =


234 x 876 = 234 x 876 =

(P / C) 204,984(P / C) 204,984

Use the Distributive Use the Distributive Property to solve the Property to solve the

following following (Show your work!)(Show your work!)

5 x 210 = ?5 x 210 = ?

Use the Distributive Property Use the Distributive Property to solve the following to solve the following

(Show your work!)(Show your work!)

5 x 210 = ?5 x 210 = ?

5 x (200 + 10)5 x (200 + 10)(5 x 200) + (5 x 10)(5 x 200) + (5 x 10)

1,000 + 501,000 + 501,0501,050

Use the Distributive Use the Distributive Property to solve the Property to solve the

following following (Show your work!)(Show your work!)

4 x 425 = ?4 x 425 = ?

Use the Distributive Property Use the Distributive Property to solve the following to solve the following

(Show your work!)(Show your work!)

4 x 425 = ?4 x 425 = ?

4 x (400 + 25)4 x (400 + 25)(4 x 400) + (4 x 25)(4 x 400) + (4 x 25)

1,600 + 1001,600 + 1001,7001,700

What is the What is the Best EstimateBest Estimate of the product?of the product?

88 x 69 = ?88 x 69 = ?


88 x 69 = ?88 x 69 = ?

90 x 70 = 6,30090 x 70 = 6,300


6,045 x 11 = ?6,045 x 11 = ?


6,045 x 11 = ?6,045 x 11 = ?

6,000 x 10 = 60,0006,000 x 10 = 60,000

The city is planning to The city is planning to buy 9 acres of land to buy 9 acres of land to

expand the city’s park. expand the city’s park. Each acre of land will Each acre of land will cost $555,555. What cost $555,555. What will it cost the city to will it cost the city to

buy all 9 acres?buy all 9 acres?

The city is planning to buy The city is planning to buy 9 acres of land to expand 9 acres of land to expand the city’s park. Each acre the city’s park. Each acre of land will cost $555,555. of land will cost $555,555. What will it cost the city to What will it cost the city to

buy all 9 acres?buy all 9 acres?

$555,555 x 9 = $555,555 x 9 = $4,999,995$4,999,995

chapter 2 review. using mental math, solve the following: 25,000 x 20 = ?

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