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39 votes
39 votes
Use properties of rational numbers to multiply the following.

-10.8 × (-54.3)

A.
586.44
B.
-586.44
C.
58.644
D.
-58.644

User Vojtech Kurka
by
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1 Answer

11 votes
11 votes
The answer is A. 586.44.

It is important to note that when multiplying two rational negative number, the negative sign disappears.

In simpler terms, a negative multiplied by a negative is positive.

That rule eliminated choices B and D.

Since this is multiple choice, all you’d have to do is take 10 and multiply by 54 to get 540, to get a number close to the actual answer (multiplying by 10 is easy). This method automatically eliminates C since C is nowhere close to 540.
User OneSneakyMofo
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2.3k points