Topic 3 Review: Multiplication

Properties

100

Identify the property:

2 x 0 = 0

Zero Property

200

Identify the property:

12 x (3 X 45)   = (12 x 3) x 45

Associative Property, the grouping changed

300

Does the Commutative Property work with division?

Think!   4 divided by 2   =   2 divided by 2

Is that true?

No, the Commutative Property only works with addition and multiplication. 

400

Identify the TWO properties being used:

4 x 5 x 1   =   5 x 4 x 1

Commutative Property, the order is being changed

Identity Property, 1 is a factor

500

Identify the TWO properties being used AND fill in the missing factor:

3 x (5 x 0)   =  (3 x __ ) x 0 

The Associative Property, the grouping changed

The Zero Property, 0 is a factor

3 x (5 x 0)   =    (3 x 5) x 0

Multiples of 10

100

Solve:

4 x 100 = 

400

200

Solve:

30 x 500 = 

1,500

300

Solve:

20 x 300 x 7 = 

42,000

400

Solve:

300 x 50 x 100

1,500,000

500

Solve:

5 x 70 x 300 = 

105,000

Powers of 10

100

Write in expanded form and standard form:

10⁴  = __________________ = ______

10⁴  = 10 x 10 x 10 x 10 = 10,000

200

Write in exponential form and standard form:

_____  = 10 x 10 x 10 = ______

10³ = 10 x 10 x 10  = 1,000

300

Solve:

5 x 10⁴ = 

50,000

400

Solve:

37 x 10² =

3,700

500

Solve:

3 x 60 x 10³ =

180,000

Multiplying Large Numbers

100

84 x 5 = 

420

200

Solve using an AREA MODEL:

23 x 46 = 

            20               3

40     20 x 40       40 x 3        

           800            120            920

6        20 x 6         6 x 3   

            120             18            138

23 x 46 = 1,058

300

58 x 31 = 

1,798

400

345 x 321 =

110,745

500

785 x 467 = 

366,595

Draw a Picture Word Problems

100

Mary is baking cookies. She needs 15 trays of cookies. Each tray holds 12 cookies. How many cookies is Mary making?

Draw a picture, solve, and write your answer in a sentence.

Picture: 15 boxes with 12 in each

15 x 12 = 180

Mary will make 180 cookies. 

200

Lucian plays 21 regular season baseball games a year. If the team has 16 hits a game, how many hits will they have all season?

Draw a picture, solve, and write your answer in a sentence.

Picture: 21 boxes with 16 in each

21 x 16 = 336

Lucian's team will have 336 hits all season.

300

When playing Zonk!, Miss Carpenter's class averages 955 points a game. In one school year, the class played a total of 23 games. How many total points did they school in one year?

Draw a picture, solve, and write your answer in a sentence.

Picture: 23 boxes with 955 in each

955 x 23 = 21,965

Miss Carpenter's class scored a total of 21,965 points in one year.