Question

18) [(-15)+15) - 150
Short Answer type
1. Find the value of:
41) (-36)-(-6)
(2) (49)-(8-1)
(3) 81+(1-10)
(4) (-54)=[(-6)+(-12)]
(5) [(-28)+28) +[(-6)+(-2)]
(6) [(-36) +25] = [(-25) +14]
Long Answer type
1. Evaluate (-48)-[(-8) - 2) and (48) + (-8)
2 and verify whether division is associative
for integers or not. No
2. For a=18,b=-6,C=-3 verify whether (a+b)
+ c and (a + c) + (b + c) are equal or not and
hence find out whether division is distributive
over addition? yes
3. A vegetable vendor earned a profit of Rs 2.50
by selling 1 kg onion but had to sell potatoes at
a loss of Rs 1.50 per kg. Although he sold 30
kg of onion, he had to bear a loss of Rs.30.
How much quantity of potatoes did he sell?
4. In Laddakh one evening at 5:00 pm the
temperature was 5º C. But due to heavy
snowfall there was a continuous drop in
temperature at the rate of 3°C per hour. What
would be the temperature at midnight ? At
what time would the temperature be 25
below freezing point i.e. below 0°C?​

Answer 1

Answer:

41) (-36)-(-6)

= -36 +6

= -30

(2) 49 - (8-1)

= 49 -7

= 42