Evaluate each expression.
| 9 |

• 0.9
• 9
• -9
• 90

| –3 |

• 3
• -3
• 0.30
• 30

Which is the greatest integer?

• -33
• -31
• -28
• -17

Which is the least integer?

• 1
• -1
• -2
• -8

Which answer has the integers in order from least to greatest?

• − 9,   -5,  -3, 0,  4,  3
• − 9,   -5,  -3, 0,  3,  4
• − 5,   -9,  -3, 0,  4,  3
•  3, 4, 0, -3, -5, -9

The absolute value of |3| is 0.

• True
• False

Whole numbers and their opposites

• whole numbers
• integers
• fractions
• decimals

Express an integer: a debt of $50

• 50
• -50

Which is not an integer?  

• -5
• 12
• 0
• -1/2

Express as an integer:  at sea level

• 0
• -0
• 1
• -10