7th Math Review #1

Absolute Value

100

Find the absolute value of:

|-10|

10

Absolute value is the distance from zero.

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

200

What is greater:

|-6| or |3|

|-6|

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

300

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

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

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

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|

9

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

500

2 x |-5| + |4| - 14

0

Remember to use your order of operations.

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

Big number = base; little number = power

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

200

How can you rewrite 9² in expanded form?

9 x 9

300

How can you rewrite the following in exponential form?

7 x 7 x 7 x 7 x 7 

7⁵

400

What is the value of:

8⁴

4096

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

500

What is the value of:

2³ + 3² - 4²

1

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

Order of Operations

100

Simplify the following expression:

62

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

200

Simplify the following expression:

5

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

300

3 + 4² * (3 + 2)

83

400

45

500

12

Integer Operations

100

-4 + -5

 -9

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

200

14 + -12

2

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

300

-10 + 15

5

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

400

-2 + -3 + 5

0

https://www.khanacademy.org/math/arithmetic/arith-review-negative-numbers/arith-review-add-negatives-intro/v/adding-negative-numbers

500

6 + (-2 + -5)

-1

Distributive Property

100

8(4+2) = ?

48

200

5(x-3)

5x-15

300

7+9(2x-3)

18x-20

400

-3(-x-10)

3x+30

500

Solve for x

-4y + 2x + 28 = 0

x = 2y - 14

Solving Equations

100

Solve for x: -3x +5 = -22

What is x = 9?

200

2/3 x - 8 = 20

What is x = 42?

300

2x + 3( 4x - 5) = 83

What is x =7?

400

Solve for x:

5x +18 = -3x + 82

What is x = 8?

500

3x = 2(4x - 5) = -7 -2( x - 5 )

What is x = 1?