Unit 2 review: Part 2!

Unit 2 review: Part 2!

by Kevin Kirk

Multiple Choice

$$1,534\div26$$  

• 28

• 59

• 102

• 119

Order of Operations

Concept Review

One step per line * Un parte por linea

Empieza con...

• 1) Parentheses (3+4) or (7*5) or (12/4) or (5-3)

• 2) Exponents --> 4² or 3⁵ or 8³

• 3) Multiply or Divide (move left to right: izquierda a derecho)

• 4) Add or Subtract (move left to right; izquierda a derecho)

Multiple Choice

What comes FIRST when looking at an equation or expression like this?

10-3 + (3+2) * 5 + 10

• 10-3

• (3+2)

Empieza con...

• 1) Parentheses (3+4) or (7*5) or (12/4) or (5-3)

• 2) Exponents --> 4² or 3⁵ or 8³

• 3) Multiply or Divide (move left to right: izquierda a derecho)

• 4) Add or Subtract (move left to right; izquierda a derecho)

Solve Parentheses ( ) first

• 2 + (5 x 3)

• FIRST, solve (5 x 3); PRIMERO resuelva (5 x 3)

• Write the new problem 2 + 15; Escribe la neuva problema 2 + 15

• Solve one part, then go to the next line; Resuelva un parte, entonces vaya a la proxima linea

Siempre - Parentheses Primero

• 12 ÷ (4 - 2) + 3

• Parentheses first,

• En la proxima linea, escribe

• 12 ÷ 2 + 3

Multiple Choice

8 x 5 - (4 +7)

• 29

• 15

• 55

• 19

Wait - What's an Exponent?

• Base --> the "4" in 4²

• Exponent --> the "²" in 4²

• 4² is 4 x 4, NOT 4x2

• 4³ = 4 x 4 x 4 = 64

• 4^{4 =} 4 x 4 x 4 x 4 = 256

Multiple Choice

What does 3² mean?

• 3 x 2
• 3 x 3
• 2 x 2 x 2

Multiple Choice

Write each product using an exponent. 
4 x 4 x 4 x 4 x 4 

• 4⁵
• 5⁴
• 4⁶
• 4⁶

Multiple Choice

Which is equivalent to 2⁴

• 8
• 20
• 16
• 12

Multiple Choice

Which operation would you do first in the following equation?

10 - 4 ÷ 1 x 5

• Subtraction

• Division

• Multiplication

• Addition

Multiple Choice

3 x 2 + 6 x 2

• 24

• 18

• 48

• 54

Multiple Choice

3 x 6 + 8²

• 34

• 66

• 82

• 210

Multiple Choice

(6 + 2³) + 10

• 353

• 24

• 22

• 34

Order of Operations

Mult./Div. before Add/Sub ^ La multiplicación y la división antes de Add y Subtract

• Move left to right

• Mover hacia la izquierda a la derecha

Multiple Choice

2 + 2 x 2 
Evaluate and Solve                                                   

• 8
• 6

What order should I solve this in?

Multiple Choice

How do you write this decimal?

• 0.4

• 0.04

Multiple Choice

• 0.6

• 0.06

Multiple Choice

Which equation matches the model?

• 2 x 0.3 = 0.6
• 3 x 0.2 = 0.6
• 2 x 3 = 0.6
• 3 x 2 = 6

Multiple Choice

How many groups are in this model? 

• 1
• 2
• 3
• 4

Multiple Choice

What is the equation for the decimal multiplication model?

• 25 x 8 =200
• 0.25 x 8 = 0.20
• 0.8 x 25 = 2.0
• 8 x 0.25 = 2.00

Multiple Choice

How many groups are in this model? 

• 1
• 2
• 3
• 4

Multiple Choice

How many  are in each group? 

• 1.5
• 15
• 0.15
• 1.5

Multiple Choice

Which problem is represented in the model?

• 0.32 - 0.17

• 0.49 - 0.32

• 0.32 + 0.17

• 0.49 - 0.17

Multiple Choice

Which equation matches the model?

• 0.73 - 0.23 = 0.50
• 0.50 + 0.23 = 0.73
• 0.73 + 0.23 = 0.50
• 0.73 - 0.50 = 0.23

Multiple Choice

Which decimal represents the amount shaded on the models?  

• 183
• 1.83
• 1.083
• 0.83

Multiple Choice

The shaded model represents the decimal-

• 1.2

• 1.02

• 12

• 102

Multiple Choice

The shaded model represents the decimal-

• 53

• 5.03

• 5.3

• 3.5

Multiple Choice

Which equation is represented by the model?

• 0.09 ÷ 6 = 0.6

• 0.9 ÷ 3 = 0.3

• 9 ÷ 3 = 3

• 0.9 ÷ 0.3 = 3

Multiple Choice

Which equation is represented by the model?

• 2.8 ÷ 0.7 = 4

• 2.8 ÷ 0.4 = 7

• 28 ÷ 4 = 0.7

• 2.8 ÷ 4 = 0.7

Here's another example:

3 x 3 = 9 square units

For example:

5 x 5 = 25 square cm

Multiple Choice

What is the area of this shape?

• 11in

• 22in

• 28in

Multiple Choice

The area model represents 23 X 47.

What is the product of the blue section?

• 20 X 40 = 800

• 20 X 40 = 8

• 20 X 40 = 80

• 20 X 40 = 8000

Multiple Choice

The area model represents 23 X 47.

What is the product of the red section?

• 20 X 7 = 14

• 20 X 7 = 1.4

• 20 X 7 = 140

• 20 X 7 = 1400

Multiple Choice

The area model represents 23 X 47.

What is the product of the green section?

• 3 X 40 = 12

• 3 X 40 = 1.2

• 3 X 40 = 120

• 3 X 40 = 1200

Multiple Choice

The area model represents 23 X 47.

What is the product of the purple section?

• 3 X 7 = 2.1

• 3 X 7 = 21

• 3 X 7 = 210

• 3 X 7 = 2100

THERE ARE 12 INCHES IN 1 FOOT

If there are 12 inches in one foot we need to know the multiples of 12.

12, 24, 36, 48, 60, 72, 84, 96, 108, 120, 132, 144....

To find length or height that is expressed in only inches we first take that number and divide it by 12.

Multiple Choice

How many feet are in 48 inches?

• 2 feet

• 4 feet

• 5 feet

I have 13 feet of yarn. How many inches of yarn do I have?

Horse = larger unit & fly = smaller unit

Multiple Select

With everything you've learned, how many different ways can you write 3 feet? Click all that apply:

• 36 inches

• 3 feet

• 1 yard

• 2 feet

• 2 yards

Multiple Choice

372 Divided by 3 =

• 135

• 125

• 124

• 13