Question

Write numbers with appropriate signs: 40∘C below 0∘C temperature

Answer 1

Answer: a) (-)100 m

b) (+)25°C

Step-by-step explanation:

Since we have given that

(a) 100 m below sea level.

(b)25°C above 0°C temperature

We need to rewrite the following numbers with appropriate signs.

As we know from the number line of integers.

Those numbers which are less than 0 is represented by negative sign (-).

Those numbers which are more than 0 is represented by positive sign (+).

So, (a) 100 m below sea level.

It is written as (-)100 m as it is below the sea level.

(b)25°C above 0°C temperature

It is written as (+)25°C as it is above 0°C temperature.

Answer 2

Correct question:

Write numbers with appropriate signs: 40°C below 0°C temperature.

a. 30

b. 40

c. -40

d. None of these

Answer:

c) -40°C.

Explanation:

• The temperature below 0° is said to be in negative hence the sign assigned to the temperature is (-)
• The temperature above 0° is said to be in positive hence the sign assigned to the temperature is (+)

For example;

1. 13° above 0° temperature : will be denoted as +13°Cor simply 13°C
2. 13° below 0° temperature : will be denoted as -13°c.

Hence , with this logics appropriate sign allotted to 40∘C below 0∘C temperature is -40°C.

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