Answer:
(i) \[\left( -\text{3} \right)+\text{2}=-\left( \text{3}-\text{2} \right)=-\text{1}\] Since, the water level is at the eight step, therefore, he will reach the water level in 8 jumps. (ii) \[(+\text{ }4)+(-2)=4-2=2\] \[2+2+2+2=8\] Therefore, he will be out of the tank in 4 jumps. (iii) (a) \[-\text{ 3}+\text{2}+\left( -\text{ 3} \right)+\text{2}+\left( -\text{ 3} \right)\]\[+\text{2}+\left( -\text{ 3} \right)\]\[+\text{2}+\]\[\left( -\text{3} \right)+\text{2}+\left( -\text{ 3} \right)+\text{2}+\left( -\text{ 3} \right)+\text{2}+\left( -\text{ 3} \right)\] \[a+2=-8\] (b) \[\text{4}-\text{2}+\text{4}-\text{2}+\text{4}-\text{2}+\text{4}-\text{2}=\text{8}\] The sum 8 in (b) will represent going up.
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