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-7 -8 How do I Multiply these directed numbers?

Sagot :

Solution:

Given:

[tex]-7\times-8[/tex]

Directed numbers are numbers with signs.

When multiplying, the following rules apply;

[tex]\begin{gathered} -\times-=+ \\ +\times+=+ \\ -\times+=- \\ +\times-=- \end{gathered}[/tex]

Hence,

[tex]\begin{gathered} -7\times-8=(-\times-)(7\times8) \\ =+56 \end{gathered}[/tex]

Therefore, the answer is +56