Math for the trades 3

Math for the trades 3

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Scientific notation: 

• From time to time you’ll have to figure out a square root or multiply a dimension by Pi to calculate the current in a multi-phase motor or determine the right size of a pipe.

Multiple Choice

13² = ______

• 225
• 196
• 169
• 166

Multiple Choice

121 = ______

• 11²
• 12
• 11
• 112

Multiple Choice

2² = _____

• 2

• 6

• 4

• 16

Multiple Choice

The area of a square is 36 cm².  What is the length of one side?

• 6 cm
• 24 cm
• 9 cm
• 9 cm

Multiple Choice

√400

• 19

• 20

• 21

• 22

Multiple Choice

We use this value for PI:

• 3.14
• 314
• 3.41
• 31.519875

Multiple Choice

The symbol for Pi is

• π
• Σ
• Ψ
• ⊈

Multiple Select

What is the formula to find the circumference of a circle?

• Pi times radius squared

• Two times Pi times diameter

• Two times Pi times radius

• Pi times diameter

Multiple Choice

_____________ is twice the radius

• circumference

• center

• radius

• diameter

Multiple Choice

_____________ is half of the diameter

• circumference

• center

• radius

• diameter

Multiple Choice

_____________ is the distance around the circle

• circumference

• center

• radius

• diameter

Multiple Choice

The square root of 59 falls between which two consecutive whole numbers?

• 7 and 8

• 8 and 9

• 10 and 11

• 9 and 10

Multiple Choice

In between what two integers is the square root of 30?

• 5 and 6

• 6 and 7

• 7 and 8

• 8 and 9

Multiple Choice

Between what two numbers can the square root of 8 be found?

• Between 1 and 2 and closer to 1

• Between 1 and 2 and closer to 2

• Between 2 and 3 and closer to 2

• Between 2 and 3 and closer to 3

Multiple Choice

Estimate the square root.

• Between 1 and 2 and closer to 1

• Between 1 and 2 and closer to 2

• Between 2 and 3 and closer to 2

• Between 2 and 3 and closer to 3

Multiple Choice

Estimate the square root.

• Between 3 and 4 and closer to 3

• Between 2 and 3 and closer to 3

• Between 3 and 4 and closer to 4

• Between 2 and 3 and closer to 2

Multiple Choice

14²

• 169
• 196
• 28
• 144

Multiple Choice

6²

• 36
• 12
• 25
• 42

Multiple Choice

5²

• 16
• 25
• 20
• 10

Multiple Choice

Which number has a square root that  is between 5 and 6?

• 48
• 81
• 28
• 36

Multiple Choice

In between what two integers is the square root of 44?

• 3 and 4
• 4 and 5
• 5 and 6
• 6 and 7

Multiple Choice

In between what two integers is the square root of 77?

• 5 and 6
• 6 and 7
• 7 and 8
• 8 and 9

Multiple Choice

Estimate √5 to the nearest tenth:

• 2.2
• 2.9
• 4.1
• 3.2

Multiple Choice

√100

• 15

• 10

• 11

• 12

Multiple Choice

10 x 5 =

• 40

• 50

• 60

• 70

Multiple Choice

36 ÷ 4 =

• 6

• 7

• 8

• 9

Multiple Choice

I have $10. I spend $4.50. How much money do I have now?

• $5.50

• $4.50

• $3.50

• $5.00

Multiple Choice

99 ÷ 11 =

• 8

• 9

• 10

• 11

Multiple Choice

30×50

• 1500
• 15
• 150
• 15000

Multiple Choice

80×700

• 5600
• 560000
• 56000
• 65000

Multiple Choice

50×80

• 6500
• 5400
• 5000
• 4000

Multiple Choice

900×90

• 6100
• 8100
• 7100
• 5100

Multiple Choice

60×60

• 360
• 3600
• 36
• 520

Multiple Choice

What is 9 more than 60?

• 70

• 69

• 61

• 90

Multiple Choice

What is 20 more than 50?

• 60

• 40

• 70

• 52

Multiple Choice

What is 10 less than 110?

• 100

• 120

• 11

• 90

Multiple Choice

What is 4 more than 25?

• 24

• 29

• 35

• 15

Multiple Choice

What is 10 less that 19?

• 29

• 9

• 109

• 19

Multiple Choice

What is 10 more than 56?

• 57

• 46

• 66

• 11

Multiple Choice

In order for a fraction to be greater than 1, the...

• numerator should be smaller than the denominator

• numerator and denominator should be the same

• denominator should be bigger than the numerator

• numerator should be bigger than the denominator

Multiple Choice

In order to be a fraction that is equal to 1, the...

• numerator and denominator must be 1

• numerator should be bigger than the denominator

• numerator and denominator should be the same number

• numerator and denominator should be different numbers

Multiple Choice

What fraction greater than 1 is represented above?

• $\frac{9}{9}$

• $\frac{9}{4}$

• $\frac{4}{9}$

• $\frac{3}{2}$

Multiple Choice

What is 300% of 40?

• 40

• 80

• 120

• 12

Multiple Choice

What is 200% of 40?

• 40

• 400

• 80

• 800

Multiple Choice

Express 1.25 as a percentage

• 1.25%
• 12.5%
  12.5%
• 125%
• You can't have percentages greater than a 100%

Multiple Choice

Write 750% as a decimal.

• 0.750
• 75.0
• 7.50
• 7.25

Multiple Choice

Percent means

• multiply by 100
• out of 100

Multiple Choice

True or False - Percentages above 100 do not exist.

• True
• False

Multiple Choice

What is 125% as a fraction?

• 1 1/4

• 1/4

• 1 1/8

• 1/8

Multiple Choice

 $\frac{10}{5}\$ is equal to which whole number?  

• 1

• 0

• 2

• 5

Multiple Choice

UNDERSTANDING
If the exponent is a negative number...

• you will get a large number
• you will get a small number

Multiple Choice

UNDERSTANDING
If the exponent is a negative number...

• you will get a large number
• you will get a small number

Multiple Choice

UNDERSTANDING
If the exponent is a positive number...

• you will get a large number
• you will get a smaller number

Multiple Choice

Scientific Notation is made up of two number parts. The first part should be a number between 1 and 100.

• True

• False

Multiple Choice

Scientific Notation is made up of two number parts. The first part should be a number between 1 and 100.

• True
• False

Poll

This material was helpful.

• Yes and I understood it.

• Yes and I would like more practice.

• No, I knew all of this material and got 100% on all of the questions without using a calculator.