Page 22 - Maths Skills - 7

20 Maths

Where F represents the temperature in degree Fahrenheit and C represents the temperature in degree Celsius.

Planet Mean Temperature (°F) Mean Temperature (°C)
Mercury 333
Venus 867
Earth 59
Mars –85
Jupiter –166
Saturn –220
Uranus –320
Neptune –330

HOTS

1. The share price of a company dropped by 50 points but recovered 40 points the next day. What is the
net change in its price?
2. Gaurav's bank balance was ` 2,000. In a month he deposited ` 300, ` 750 and ` 450 and issued cheques
worth ` 700 and ` 1,250. Find the balance in Gaurav’s account at the end of the month?

9 9C
3. To convert temperature from Celsius to Fahrenheit, we multiply by and add 32, i.e., F = + 32.
Find the Fahrenheit temperature that corresponds to: 5 5
(i) –15°C (ii) 15°C (iii) – 40°C

4. Complete the following tables by performing the required operation.
(i) Multiplication: Multiply the integers in the horizontal top row with those in the vertical left column.

× 1 – 2 3 – 4

0 0

1 – 2

3 9

(ii) Division: Divide the integers in the horizontal top row by the integers given in the vertical left
column.

÷ 0 6 – 12 18

1 0

– 2 6

– 6 – 1