Unit 2 Math Review

3rd Grade

100

Find the sum:

3 + 3 + 3 + 3 + 3

15

200

Find the product:

5 x 5

25

300

Write the expression below as repeated addition:

6 x 7

6+6+6+6+6+6+6

OR 7+7+7+7+7+7

400

6 x (8 x 3) = (6 x 8) x 3

is an example of

Associative Property

All About Arrays

100

Write an equation for the array 

@ @ @ 

@ @ @ 

@ @ @

3 x 3 = 9

200

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4 x 5 = 20

300

These arrays represent what property?

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Commutative Property

400

Draw an array for 7 x 5

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4th Grade

100

13 x 7

91

200

The chicken is 5 times taller than the egg. The egg is 8 inches tall. How tall is the chicken?

40 inches tall

300

List the COMPOSITE FACTORS of 18

6, 9, 18

400

3 (500,000) + 3 (40,000) + 3 (600) + 3(30) + 2(3)

is an example of...

Distributive Property

Break It Up!

100

Use DISTRIBUTIVE PROPERTY to solve:

9 x 6

4 x 6 = 24

5 x 6 = 30

24 + 30 = 54

200

Use DISTRIBUTIVE PROPERTY to solve:

314 x 6

6(300) + 6(10) + 6(4) = 1,884

300

Use DISTRIBUTIVE PROPERTY to solve:

12 x 4

6 x 4 = 24

6 x 4 = 24

24 + 24 = 48

400

Use DISTRIBUTIVE PROPERTY to solve:

531 x 2

2(500) + 2(30) + 2 (1) = 1,062

State the Facts

100

3 x 6

18

200

8 + 8 + 8 + 8

32

300

4 x 9

36

400

7 x 1

7