O P Malhotra, S K Gupta and, Anubhuti Gangal Solutions for Chapter: Integers, Exercise 1: Exercise

Write the additive inverse of $-125$

Write the additive inverse of $0$

Write the additive inverse of $|-89|$

Ronak rode on a roller coaster. He was at an elevation of $55 \mathrm{m}$ above the mean sea level when he started the ride. During the ride the elevation changes as $412 \mathrm{m},$$-125 \mathrm{m}, 272 \mathrm{m},-343 \mathrm{m},490 \mathrm{m},-640 \mathrm{m}$ and $50 \mathrm{m}$. What is his elevation relative to the mean sea level at the end of the ride?

The base of the Hawaiian volcano Mauna Loa is about $\mathrm{13,000}$ metres below the mean sea level and its summit is about $4170$ metres above the mean sea level. Find the difference between the elevation of Mauna Loa’s summit and its base.

An elevator is $12$ metres below ground. It descends to a point $100$ metres below the ground. What is the change in the elevation of the elevator?

You write an essay for your final exam worth $40\mathrm{}$ marks. The teacher deducts $12\mathrm{}$points for incorrect grammar and gave $7$ bonus points for creativity. Which expression does not represent your final score?

Preeti had mixed fruit juice in a jar that had a temperature of $10°\mathrm{C}.$ She poured it into $6$ glasses and froze the juice to $-2°\mathrm{C}.\mathrm{}$ What is the change in temperature of the juice?