Suppose my weight 1 year ago was 95 kg

My weight now is 100 kg

So, I have increased 5 kg

But

If my weight becomes 85 kg

Then, I have reduced 10 kg

But these 5 kg & 10 kg aren’t the same

One is positive, + 5 kg

Other is
**
negative
**
, −10 kg

Similarly

If we deposit 200 rupees to the bank

It is positive,
**
+200
**

If we withdraw 500 rupees from the bank,

It is negative
**
−500
**

Similarly

Plane is 5000 m above sea level .

It is positive,
**
+ 5000 m
**

Submarine is 1200 m below sea level .

It is negative ,
**
−1
**
**
2
**
**
00
**
**
m.
**

Therefore ,

Just like positive numbers : 1, 2, 3, 4, 5, …...

We have negative numbers : −1, −2, −3, −4, −5, …….

**
What about 0?
**

0 is neither positive, nor negative.