Pre Algebra Review

Absolute Value & Square Root

100

Find the absolute value of:

|-10|

Absolute value is the distance from zero.

What is 10?

200

Simplify square root of 81

9

300

Place the following in order from smallest number, to biggest number:

|-20|, 18, |12|, |-14|, 8

What is 8, l 12 l, l -14 l, 18, l-20 l?

The absolute value of a number is the number's distance from zero.

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-abs-value/v/absolute-value-of-integers

400

What is:

|-7| + |-2|

The absolute value of a number is the number's distance from zero.

What is l -9 l ? Absolute value of -9.

500

Simplify square root of 25

5

Exponents

100

When you see the following expression, what is the big number called and what is the little number on top of it called?

2⁴

https://www.khanacademy.org/math/pre-algebra/pre-algebra-exponents-radicals/pre-algebra-exponents/v/introduction-to-exponents

What is base? What is exponent?

200

How can you rewrite 9² in expanded form?

What is 9x9?

300

How can you rewrite the following in exponential form?

7 x 7 x 7 x 7 x 7 

What is 7^5?

400

What is the value of:

^{7^4}

2401

500

What is the value of:

2³ + 3² - 4²

https://www.khanacademy.org/math/pre-algebra/pre-algebra-exponents-radicals/pre-algebra-exponents/v/introduction-to-exponents

What is 1?

Order of Operations

100

Simplify the following expression:

https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/v/introduction-to-order-of-operations 

What is 62?

200

Simplify the following expression:

https://www.khanacademy.org/math/pre-algebra/pre-algebra-arith-prop/pre-algebra-order-of-operations/v/introduction-to-order-of-operations

What is 5?

300

3 + 4² * (3 + 2)

What is 83?

400

 

What is 45?

500

What is 30?

Solve

100

x - 5x = 64

What is x = -16

200

-0.3m = -12

What is 40?

300

2.5x = -60

What is -24

400

x - (-3) = 5

What is 2

500

x - 0.9x = 7

What is 70?

Equalities

100

0 =  3x - 3 - 6

3 = x

200

4x + 1 − 1 = −8

x = -2

300

2p − 4p  = −2

p = 1

400

 10 =  2n  + 3n

2= n

500

3 − 2(n − 4) = −1

n = 6

Percents/ Ratios

100

10% of 86

8.6

200

If 12 pencils cost $15. How much does 24 pencils cost?

$30

300

34% of 78

26.52

400

If I can walk 1.5 miles in 45 minutes, how many miles can I walk in an hour.

2 miles

500

97% of 728

706.16

GCF/LCM

100

Find the GCF of 18 and 9

9

200

Find the LCM of 6 and 5

30

300

Find the GCF of 21 and 14

7

400

Find the LCM of 10 and 12

60

500

Find the GCF and LCM of:

36 and 24

GCF = 12

LCM = 72

Pythagorean Theory

100

In a right triangle A = 3, b= 4, what is the measurement of C?

C = 5

200

A = 6, B= 8, What is the measurement of C?

10

300

If A = 8 and C = 10. What is the measurement of B?

B = 8

400

A =12, B = 5, What is the measurement of C?

C = 13

500

C = 25, B = 20, What is the measurement of A?

A = 15