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 196

14

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:

3^3 + 2 ^ 4 - 16

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

What is 27

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:

4 x 4 - 7 + 9

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

What is 18

300

3 + 4² * (3 + 2)

What is 95?

400

 7^3 -(7 x 8) + 2^3

What is 295

500

What is 30?

Solve

100

2x - 5x = 21

What is x = -7

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

96% of 728

655.2

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 6

30

500

Find the GCF and LCM of:

48 and 24

GCF = 24

LCM = 48

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 = 12 and C = 13. What is the measurement of B?

B = 5

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