Multiplication

Vocabulary

100

A _________ is the result of multiplying two numbers together.

product

200

________ are two numbers multiplied together

factors

300

The ___________ property of multiplication says that changing the order of factors does not change the product

commutative

400

Twelve is four times as much as three.

This is an example of a ____ ____ .

multiplicative comparison

500

Name two strategies we have learned for multiplication.

"old school" algorithm, expanded form, area model, partial products, distributive property

Comparisons

100

Write an equation for the following:

Twenty is twice as many as ten

20 = 2 x 10

200

Write an equation for the following:

Eighteen is ten more than 8

18 = 8 + 10

300

Earthworms have four more hearts than humans.  How many hearts do earthworms have?

5 hearts

400

Ants can lift fifty times their body weight.  An ant weighs 5 milligrams.  How much weight can the ant lift?

250 mg

500

You have 8 times as many dimes as nickels.  You have 18 dimes and nickels altogether.  How much money do you have in all?

$1.70

Multiply This

100

4 x 200

800

200

____ x 200 = 1,000

5

300

Estimate:

2 x 903

2 x 900 = 1,800

400

Compare:

308 x 6 ______ 5 x 408

<

500

936 x 7

6,552

Multiply That

100

18 x 30

540

200

Find the missing factor.

40 x _____ = 3,200

80

300

81 x 76

6,156

400

77 x 46

3,542

500

87 x 91

7,917

Problem Solving

100

A ferris wheel runs 40 times each day.  It has 16 cars with 4 seats in each car.  If the ferris wheel is full each times it runs, how many people can ride it in 1 day?

2,560 people can ride the ferris wheel in a day.

200

A music fan memorizes 59 songs for a concert.  Her goal is to memorize all the songs from 13 albums.  There are 15 songs on each album.  How many more songs does the music fan still  need to memorize?

136 songs

300

A theater has 45 rows of 72 seats on the floor level and 22 rows of 36 seats in the balcony.  How many seats are there in all?  And for a bonus, tell how many more seats are on the floor level than in the balcony

4,032 seats in all

There are 2,448 more floor seats than balcony seats.

400

A musical cast sells 1,761 tickets for a big show.  The cast needs to complete 36 days of rehearsal.  Each rehearsal is 8 hours long.  The cast has rehearsed for 102 hours so far.  How many hours does the cast have left to rehearse?

186 hours

500

An artist creates a pattern by alternating square and rectangulsar tiles.  The pattern has 14 square tiles and 13 rectanguar tiles.  Each square tile is 8 by 8 inches, and each rectangular tile is 8 by 14 inches.  How long is the pattern?

294 inches