Real Numbers and Algebraic Expressions

​Week 2

​You try

Audio Response

Evaluate the expression for the given value.

5x-2y when x=8 and y=2

Open Audio Recorder

Multiple Select

The number 0 is in which of the following set(s). Choose all that apply.

• Natural Numbers

• Whole Numbers

• Integers

Multiple Select

The number 7 is in which of the following set(s). Choose all that apply.

• Natural Numbers

• Whole Numbers

• Integers

Multiple Select

The number -5 is in which of the following set(s). Choose all that apply.

• Natural Numbers

• Whole Numbers

• Integers

​You try

Fill in the Blank

Evaluate |4|

Multiple Choice

Evaluate $$\left|-\frac{2}{3}\right|$$  

• $$-\frac{2}{3}$$  

• $$\frac{2}{3}$$  

• $$-\frac{3}{2}$$  

• $$\frac{3}{2}$$  

Fill in the Blank

Evaluate  -|3.4|

Fill in the Blank

Evaluate  -|-6|

Fill in the Blank

$$-15+21=$$  

Fill in the Blank

$$-15-3=$$  

Fill in the Blank

$$-9.1+\left(-2.3\right)=$$  

Fill in the Blank

$$9.1-\left(-1.2\right)=$$  

Multiple Choice

How would you rewrite the expression $$2+7-5$$  using additive inverse so it's only sums.

• 2+7+(-5)

• 2-7+5

• 7-5+2

• 2-7+(-5)

Fill in the Blank

Simplify $$-4-2+8$$  

Multiple Select

Which of the following products will be POSITIVE? Choose all the apply.

• (-9)(-2)

• -1.2(0.4)

• 0(-12)

• (8)(2)(-1)(-2)

Multiple Select

Which of the following quotients will be NEGATIVE? Choose all the apply.

• $$\frac{32}{-8}$$  

• $$\frac{-16}{-4}$$  

• $$-\frac{5}{8}\div5$$  

• $$\frac{12}{0}$$  

Multiple Choice

$$\left(\frac{1}{3}\right)^3$$  is equivalent to:

• $$\left(\frac{1}{3}\right)\times3$$  

• $$\left(\frac{1}{3}\right)\times\left(\frac{1}{3}\right)\times\left(\frac{1}{3}\right)$$  

• $$\left(\frac{1}{3}\right)+\left(\frac{1}{3}\right)+\left(\frac{1}{3}\right)$$  

Fill in the Blank

Simplify $$3-\left[\left(5-7\right)+2\left(6-10\right)\right]$$  

Fill in the Blank

What's the additive inverse (opposite) of 7?

Multiple Choice

What's the multiplicative inverse (reciprocal) of 7?

• -7

• 7

• $$\frac{1}{7}$$  

• $$-\frac{1}{7}$$  

Multiple Choice

Rewriting the expression $$3\cdot\left(8y\right)$$   as $$\left(3y\right)\cdot8$$   uses which property?

• Associative

• Commutative

• Both Associative and Commutative

• Neither

Fill in the Blank

Simplify $$4xy-xy+3-8+2xy$$  

(Do NOT type any spaces)