Unit 1 review

Unit 1 review

We will be review materials from the start of the year to now.

Square Roots and Perfect Squares

Open Ended

What is a perfect Square?

Multiple Choice

Is the  $\sqrt{26}$  a perfect square

• yes

• no

Multiple Choice

 $\sqrt{26}$  

Which two numbers does fall between

• 6 and 7

• 5 and 6

• 4 and 5

• 25 and 36

Poll

Do you feel like you understand perfect squares?

• Yes

• No

• I need more help

Rational vs. Irrational

• rational numbers can be written as fractions

• irrational numbers can not be written as fractions, the are decimals that do not end and do not repeat.

Multiple Choice

 $\pi$  

Is this number rational

• Yes

• No

Multiple Choice

 $\sqrt{144}$  

Is this number a rational number?

• Yes

• No

Poll

How do you feel about Rational vs. Irrational numbers?

• Great

• I got this I think

• What's going on

• I need help

Scientific Notation

•  $a\times10^n$  

• a must be a number between 1-9 and no decimals. 

• if the exponent is positive, the number is big

• if the exponent is negative, the number is small

Fill in the Blanks

Write 210,000 in scientific notation.

Multiple Choice

 $0.1245\times10^{-5}$  

Is this is scientific notation?

• Yes

• No

Comparing Numbers

• make all the numbers the same format

• compare each number to all the others

• list the numbers in their original format

Multiple Choice

Pick the larger number

• $\sqrt{225}$

• $1.5\times10^2$

Multiple Choice

Which answer has these number in order from greatest to least?

 $-\sqrt{16}$   $4.1\times10^{-2}$   $-45\%$   $-4.1$  

•  $-\sqrt{16}$   $4.1\times10^{-2}$   $-45\%$   $-4.1$  

•  $-4.1$   $-\sqrt{16}$   $-45\%$   $4.1\times10^{-2}$  

•  $4.1\times10^{-2}$   $-45\%$   $-\sqrt{16}$   $-4.1$