Eureka Math Module 4 Review

Arrays

100

The 3rd grade teachers have rectangular rugs that each take up 36 square feet.  

Draw 3 arrays that could represent the rugs.

Label each side length.

Write the multiplication number sentence & solve.

1x36=36 ft²     36x1=36 ft²

2x18=36 ft²     18x2=36 ft²

3x12=36 ft²     12x3=36 ft²

4x9=36 ft²      9x4=36 ft²

6x6=36 ft²

200

*Do before "Arrays 300"

The lunch table is 2 ft by 10 ft.

Draw and label 1 lunch table.

Find the total area of 1 lunch table.

2 x 10 = 20 sq ft.

300

*Do after "Arrays 200"

Each class has 3 total lunch tables.

What is the total area of 1 class's lunch tables?

20 x 3= 60 sq ft.

Distributive Property

100

Ms. Navratil displays student work on a 7ft x 5 ft bulletin board.

Mrs. Atkinson displays student work on 5ft x 4ft and 5ft x 3ft boards.

Who has a larger area to display work?

Ms. N. 7x5= 35 ft²

Mrs. A. 5x4= 20 ft²       5x3= 15 ft²

Mrs. A. 20+15= 35 ft²

Ms. N. and Mrs. A. have the same amount of area

200

*Do before "Distributive Property 300"

The school is building a new project room.

Find the area of A, B, and C.

*Teacher: Draw image from math book p.206 (or p212) #4.

*Students, you need to use the lengths given to figure out the other side lengths, then find the area of each rectangle.

A: 3x7= 21 sq m

B: 3x10= 30 sq m

C: 6 x10= 60 sq m

300

*Do after "Distributive Property 200"

What is the total area of the new project room?

21+30+ 60= 111 sq meters

Word Problems: build on each other, go in order

100

The students are designing the playground.

Plan A has these sections:

12m x 3m

6m x 3m

12m x 4m

What is the total area of Plan A?

12m x 3m= 36m²

6m x 3m= 18m²

12m x 4m=48m²

36 + 18 + 48= 102 sq meters

200

The students are designing the playground.

Plan B has these sections:

3m x 3m

9m x 3m

12m x 4m

What is the total area of Plan B?

3m x 3m= 9m²

9m x 3m= 27m²

12m x 4m=48m²

9 + 27 + 48= 84 sq meters

300

Which playground plan would you want?

Why?

Plan A, it's 18 sq meters bigger than Plan B.

102-84= 18m²

Vocabulary

100

The amount of space something takes up?

area

200

Explain the Distributive Property of Multiplication in words.

break apart

300

The answer in:

addition

subtraction

multiplication

division

sum

difference

product

quotient

Other

100

How do you label area?  Why?

units squared

It's the whole space (grid, rug), not just a line (edge).

200

How does knowing multiplication help you figure out area?

You can find the area of rectangles.  The rectangles are like arrays in multiplication.

300

Skip count by 6s:

6, 12,......................................60

6, 12, 18, 24, 30, 36, 42, 48, 54, 60