Chapter 6 - Operations with Integers

-1 and 1 are ​ (a)   . They are also a ​ (b)  

• additive inverses
• zero pair

Evaluate the sum or difference.

(sum = the answer to an addition; difference = the answer to a subtraction)

• -89

• 52 + (-52)

• -105

• -25 + (-9)

• 8

• -61 - 28

• -34

• 35 - 140

• 0

• -6 + 14

When you wake up on Monday, the temperature is -18°C. By 2pm, the temperature has risen by 13°C. What is the temperature at 2pm?

• 5°C

• -5°C

• 12°C

• -21°C

At 8am this morning the temperature was -7°C. Then, by noon, the temperature had risen 13°C. By 4pm, the temperature dropped by 5°C, then another 8°C by 9pm. What was the temperature at 9pm.

• -33°C

• -23°C

• -7°C

• -33°F

Match the difference between the daily high temperature in July and in January for each of the cities below?

• 35°C

• Vancouver, BC

  24°C in July

  7°C in January

• 27°C

• Winnipeg, MAN

  21°C in July

  -15°C in January

• 33°C

• Kirkland Lake, ON

  25°C in July

  -10°C in January

• 31°C

• Iqaluit, NUN

  12°C in July

  -21°C in January

• 36°C

• Point Pele, ON

  26°C in July

  -1°C in January

You have $85 in your bank account. You buy a bicycle for $126. What is you financial status after that purchase?

A submarine was 90m below sea level. It dives down another 35m. The submarine is now how many metres below sea level?