Can there be a number less than 0? Can you think of any ways to have less than 0 of something? Class 6

Can there be a number less than 0? Can you think of any ways to have less than 0 of something? Class 6

Question 1.

Can there be a number less than 0? Can you think of any ways to have less than 0 of something? Class 6

Solution:

Yes, there can be number less than 0. There are many ways in which we can think to have less than 0 of something. For example, temperatures of places going less than 0°C; if we consider height of many things (in any units) above certain level (say sea level) as greater than 0 units, then we can consider the depths of so many things as less than 0 units, and so on.

Question 2.

What do you press to go four floors up? What do you press to go three floors down? Class 6

Solution:

+4 and -3 respectively (or +, +, +, + and -, -, - respectively).

Question 3.

You start from Floor + 2 and press -3 in the lift. Where will you reach? Write an expression for this movement. Class 6

Solution:

We will reach floor -1; (+2) + (-3) = -1.