Question

1.
Indicate the following by using integers.
(a) Earning 500
(b) Loss of 90
(c) Climbing up 10 steps
(d) Withdrawal of 500 from a bank
(e) 5 m above sea level
(f) 3 km towards north
(g) 10°C below zero
(h)
An increase of 25 marks​

Answer 1

Integers :

• The numbers 0, ± 1, ± 2, ± 3, ... are called integers.

• When something is positive, we write + for that integral value and when something'm is negative, we write - for that integral value.

Solution :

• (a) earning 500 : since it is adding some value, it is positive and thus it is written as (+ 500).

• (b) loss of 90 : since it is diminishing some value, it is negative and thus it is written as (- 90).

• (c) climbing up 10 steps : since it is adding some value, it is positive and thus it is written as (+ 10).

• (d) withdrawal of 500 from a bank : since it is diminishing some value, it is negative and thus written as (- 500).

• (e) 5 m above sea level : since it is above the sea level, it is always positive and thus it can be written as (+ 5) m.

• (f) 3 km towards north : since it is adding some value towards a direction, it is always positive and thus it is (+ 3) km.

• (g) 10° C below zero : since it is below zero, it is negative and is written as (- 10°) C.

• (h) an increase of 25 marks : since it is adding some marks, it is positive and it is written as (+ 25).

Answer 2

Answer:

It is aad some digit +500