Unit 1 Real Numbers Review

Unit 1 Real Numbers Review

Classify the real numbers

• -15

• 2/3
  

• 3.14159...

• 738

• 0

Multiple Select

Check all that apply: Classify the real number, -18

• Irrational

• Rational

• Integer

• Whole

• Natural

Multiple Select

Check all that apply: Classify the real number,

 $\sqrt{20}$  

• Irrational

• Rational

• Integer

• Whole

• Natural

Multiple Select

Check all that apply: Classify the real number, 0

• Irrational

• Rational

• Integer

• Whole

• Natural

Multiple Select

Check all that apply: Classify the real number, -1/3

• Irrational

• Rational

• Integer

• Whole

• Natural

Multiple Select

Check all that apply: Classify the real number,

 $-2\pi$  

• Irrational

• Rational

• Integer

• Whole

• Natural

Converting between decimals, fractions, and percents

• D --> F, place value of last digit is the denominator

• F --> D, divide numerator by denominator

Fill in the Blank

Write the fraction as a decimal:

 $\frac{2}{5}$  

Fill in the Blank

Write the decimal as a simplified fraction: 0.45

The NINE TRICK

• Repeating decimals: how many unique digits are repeating?... that tells you how many 9's to put in denominator

• Numerator: use the repeating digits

Fill in the Blank

Write the repeating decimals as a fraction:

 $0.\overline{4}$  

Fill in the Blank

Write the repeating decimal as a fraction:

 $0.\overline{35}$  

Convert between fractions and percents

• A percent is out of 100, then simplify

• Fraction to percent: see picture

Converting Decimals and Percents

• D--> P: move decimal left 2 times

• P --> D: move decimal right 2 times

Multiple Select

Check all that are equal to 85%

• 0.85

• 8.5

• 85/100

• 17/20

Multiple Select

Check the 2 values that are equal to 1.7

• 17%

• 170%

• 17/10

• 17/100

Fill in the Blank

Write 175% as a decimal:

Fill in the Blank

Write 0.05 as a percent