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Multiple of 10
Arrays
100
9 X 10
What is 90?
100
Estimate? 32 X 8
What is 240?
100

Write an equation for the following scenario:
Jocelyn brought 42 mini cupcakes to give to her class for her birthday. There are 22 students in her class but one was absent. How many cupcakes did each student get if Jocelyn gave them all out? 

42 / 21 = 2
How to solve?
21 x ? = 42

100
23 X 20
What is 460?
100

Write the equation for the following array and solve.
5 rows of 7

5x7=35

200
7 X 100
What is 700?
200
Estimate: 42 X 53
What is 2,000?
200

If a cheetah can run 104 ft. per second, about how fast can they run in 12 seconds?

1248 ft.

200
85 X 20?
What is 1,700?
200

Write the equation for the following array. 

8 groups of 3

8x3=24

300
6 X 700
What is 4,200?
300
Estimate: 166 X 66
What is 14,000?
300

About 20 inches of rain falls monthly in a coastal rain forest. About how many inches is that yearly?

240 inches
How to solve:
20in of rain x 12 months = 240 in per year

300
239 X 70
What is 16,730
300

Draw the array for the following equation. 7 x 3

x x x 

x x x 

x x x 

x x x 

x x x

x x x

x x x

400
475 X 1,000
What is 475,000?
400
523 X 498
What is 250,000?
400

What is the answer to a multiplication problem called?

Product

400
221 X 80
What is 17,680?
400

Draw the array and solve for the following equation. 

8 x 5

8 rows of 5 columns
8x5=40

500
3 X 2,500
What is 7,500?
500
2,019 X 23 = N
What is 40,000?
500

A school group is doing volunteer work at a zoo. The volunteers wear special shirts and hats. The shirts are red or blue. the hats are either purple, orange, or green. How many different ways can a volunteer choose to wear one shirt and one hat?

What is 6?

500
2,402 X 30
What is 72,060?
500

Draw an array and solve the problem:
Harry buys 9 dozen eggs. How many eggs does he have in all?

108 eggs
9 rows of 12 columns each

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