Using Negative numbers

If -15 represents 15 m below sea level, then +20 represents ........

If -10 represents the distance of 10 km of a car travelling South, then +10 represents ................

If +100 represents a profit of $100 on the sale of a mobile phone, then -91 represents ..............

 $-12\ \ \left(\ \ \ \ \right)\ -16$  Choose the appropriate inequality symbol to make the statement true.

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 $-\frac{12}{2}\ \left(\ \ \ \right)\ -5$  Choose the appropriate inequality symbol to make the statement true.

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 $\left(-1\right)^3\ \left(\ \ \ \ \right)\ 3$  Choose the appropriate inequality symbol to make the statement true.

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Which of the following is arranged in ascending order?

•  $-1,\ -1.5,\ 2,\ 3,\ 8$  

•  $-100,\ \ -50,\ \ -8,\ \ \ \ 0,\ \ -2$  

•  $-3.6,\ -2,\ \ -\frac{4}{3},\ \ 1.5$  

Evaluate: 6 - (-11)

Evaluate: $-8-\left(-11\right)$  

 $Evaluate:\ \ \left(-25\right)-\ \left(-10\right)+\left(-7\right)$