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Using your calculator for these is much easier if you use the \"negative number\" button instead of the \"minus\" button.

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It is usually labelled as either   [ (-) ]   or   [  +/-  ].

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a)   $(\\var{a1}) \\times (\\var{a2})=\\var{a3}$

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b)   $(\\var{a1}) \\times (\\var{a1})=\\var{a1a}$   both numbers have the same sign so answer is positive

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c)   $(\\var{c1}) \\div (\\var{c2})=\\var{c3}$

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d)   This is the same as  c)  but written differently:

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\\[ \\frac{(\\var{c1})}{(\\var{c2})}=(\\var{c1}) \\div (\\var{c2})=\\var{c3}\\]

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      It could also be written as    $\\Large -\\frac{(\\var{c1a})}{(\\var{c2})} $  

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e)   $-(-)$  gives  $+$  so  $(\\var{e1}) - (\\var{e2})=\\var{e3}$

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f)   There are an even number of negatives so the answer will be a positive number.

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Questions based on Exercise Intro(a) from the Textbook \"Engineering Maths through Applications\" by Kuldeep Singh.

Intended for use as Homework Exercises.

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Using your calculator, or otherwise, calculate the following:

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