Question

Indicate the following by using integers:
(i) ${25}^{\circ }$ above zero.
(ii) $5^{\circ }$ below zero
(iii) A profit of $Rs.800$
(iv) A deposit of $Rs.2500$
(v) $3km$ above sea level
(vi) $2km$ below sea level

Answer 1

Integers:

The combination of positive numbers, negative numbers and zero.

$......-3,-2,-1,0,1,2,3,......$

In general, positive numbers are shown right wards or up wards from $0$ on the number line, negative numbers are shown left wards or down wards from $0$ on the number line.

In daily life, profit represents with positive numbers and loss represents with negative numbers.

Now, lets represent given situations with integers.

(i) ${25}^{\circ }$ above zero.

If temperature is above zero, then it should be positive, i.e., $+{25}^{\circ }$
(ii) $5^{\circ }$ below zero

If temperature is below zero, then it should be negative, i.e., $-5^{\circ }$
(iii) A profit of $Rs.800$.

If there is a profit of $Rs.800$, then it should be $+800$.
(iv) A deposit of $Rs.2500$

Deposition of $Rs.2,500$ indicates that money in the account is increased; therefore, it should be $+2500$ .
(v) $3km$ above sea level

Here, the distance is above the sea level; therefore, it should be $+3$.
(vi) $2km$ below sea level

Here, the distance is below the sea level; therefore, it should be $-2$.