Q1 Review

Which of the following are integers? Select ALL that apply.

• $-5$
  

• $0.85$
  

• $\frac{1}{2}$

• $0$

• $120$

Answer explanation

Integers are all positive and negative whole numbers, including zero! (So, no decimals and no fractions.)

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Integers & Absolute Value

Explain why 1 and -1 have the same absolute value.

• They are equal.

• They are the same distance from zero on a number line.

• They are both integers.

• They are both odd.

Answer explanation

-1 and 1 are both ONE place away from zero on a number line.

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Integers & Absolute Value

Which of the following equal 2? Select ALL that apply.

• $\left|4\right|$

• $\left|2\right|$

• $-2$

• $\left|-2\right|$

Answer explanation

The absolute values both end up being positive (since -2 and 2 are both TWO places away from zero on a number line).

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Integers & Absolute Value

If each tick mark represents an integer on the number line (spaced one apart), which letter is at -2?

• A

• B

• C

• D

• There is no letter at -2.

Answer explanation

-2 would be 2 places to the left of zero on the number line. There is no letter there!

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Integers & Absolute Value

Select the comparison symbol that makes this statement true:

-1 _____ -5

• >

• <

• =

Answer explanation

-1 is greater than -5. As you can see, -1 is to the right of -5 on the number line.

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Comparing Integers

Select the comparison symbol that makes this statement true:

-10 _____ 2

• >

• <

• =

Answer explanation

-10 is less than 2. As you can see, -10 is to the left of 2 on the number line. In fact, all negative numbers are less than all positive numbers.

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Comparing Integers

 $-18+\left(-4\right)=$  

Answer explanation

If integers have the SAME SIGN (both negative), you add the numbers together and keep the negative sign.

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Adding & Subtracting Integers

$4-10=$

Answer explanation

For subtraction problems, KEEP CHANGE CHANGE. So, instead of solving $4-10$ , rewrite it as $4+\left(-10\right)$ . Since they have DIFFERENT SIGNS, you'll subtract the numbers and keep the sign of the "larger" number.

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Adding &amp; Subtracting Integers

$-3\left(-2\right)=$

Answer explanation

Since you are multiplying and they have the SAME SIGN (both negative), the answer will be POSITIVE.

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Multiplying & Dividing Integers

$-30\div6=$

Answer explanation

Since you are dividing and they have DIFFERENT SIGNS, the answer will be NEGATIVE.

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Multiplying &amp; Dividing Integers