Powers of 10
Vocabulary
Word Problem
Multiplication
Multiplication 2
Estimate
100

3 x 100

300

100
What is the answer to a multiplication problem called?
Product
100
If I buy 10 books that each cost $5, how much money will I spend?
$50
100
121 x 3
363
100
42 x 8
336
100

Round to the nearest hundred: 438

400

200

68 x 10

680

200

A picture showing a multiplication problem, using equal groups put into rows, is called...

Array

200
There are 3 fourth grade classes, with 25 students in each. How many students are in fourth grade?
75
200

23 x 4

92

200

13 x 7

91

200

Round to the nearest ten: 79

80

300
17 x 100
1700
300
When you increase the size of your number by multiplying by two you are...
doubling
300

Each fourth grader needs 5 pencils a month. If there are 75 total fourth graders, how many pencils does Mrs. Habben need to buy this month?

375

300

89 x 2

188

300

87 x 5

435

300

Estimate the product: 17  x  9  = ____

20  x  9  =  180

400

400 x 2

800

400
When you change 142 into 100 + 40 + 2 you are putting it into...
expanded form
400
There are 64 dogs in the doggy daycare. Each dog gets 5 treats a day. How many treats are given to all the dogs in one day?
320
400

45 x 3

135

400

88 x 7

616

400

Estimate the product: 337  x   4  =  ______

300  x  4  =  1,200

500

200 x 5

1,000

500
What is the word form of 520?
Five hundred twenty
500

The library has 76 bookcases. Each bookcase has 8 books. How many total books are in the library?

608

500

6573 x 5

32,865

500
5973 x 9
53,757
500

Estimate the product:  4,762  x  6  =  _____

5,000  x  6  = 30,000