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Integers in Context

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Integers in Context

Use positive and negative integers to represent situations. Show your working where needed.

Positive and Negative Integers

1.A space probe records a temperature of 9 degrees below zero. Which integer represents the temperature?

−9°C
+9°C
0°C

2.Xavier's mission account is overdrawn by $14. Write the balance as an integer amount.

3.Tahnee adds $23 to the mission account. Which integer describes this change?

−23
+23
0

4.Which is colder: −6°C or +1°C?

5.Put these temperatures in order from coldest to warmest: +4°C, −9°C, −2°C, +7°C, 0°C.

Integers on a Number Line

6.The probe's temperature is −5°C. It rises by 8°C. What is the new temperature?

7.Dylan has $7 in the mission fund and spends $12 on supplies. Represent the result as an integer amount.

8.The temperature falls from +4°C to −7°C. By how many degrees does it fall?

9.Select every integer greater than −4.

−7
−3
0
−4
+6

Integers in Mission Situations

10.Over four days, Xavier's mission-fund changes are: Monday, earns $16; Tuesday, spends $9; Wednesday, owes $6; Thursday, receives $4. Write an integer for each day's change, then find the total change across the four days.

11.In your own words, explain why an integer below zero can describe both a temperature and a bank balance.

12.The ice sensor reads −11°C. How many degrees must the temperature rise to reach +6°C?