Integers
Calculate:
1 – 2 + 3 – 4 + 5 – 6 + 7 – 8 + 9 – 10
Composition and structure of atmosphere
Oxygen gas is in negligible quantity at the height of atmosphere:
(a) 90 km
(c) 100 km
(b) 120 km
(d) 150 km
Integers
How many integers are there between –9 and –2 ?
Integers
Using the number line, subtract : (a) 2 from –3
(b) –2 from –3.
Integers
Using the number line, subtract : (a) 2 from –3
(b) –2 from –3.
Integers
Subtract : (i) 3 from –4 (ii) –3 from –4
Composition and structure of atmosphere
Sea salt, pollen, ash, smoke soot, fine soil — these are associated with:
(a) Gases
(c) Water vapour
(b) Dust particles
(d) Meteors
Integers
Find the sum of –2 and –3, using the number line.
Integers
Find the sum of the pairs of integers:
(a) – 6, – 4 (b) +3, – 4 (c) +4, –2
Integers
Represent the following using integers with proper sign:
(a) 3 km above sea level (b) A loss of Rs 500
