SOLUTION: sigh...help me please. Multiply (10)(6)(-9)

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Question 117898: sigh...help me please.
Multiply (10)(6)(-9)
Answer by MathLover1(20850) About Me  (Show Source):
You can put this solution on YOUR website!
1.
Multiplication of a positive number by a positive number yields a positive+result; for example, 2+%2A+3+=+6
2.
Multiplication of a +positive+ number by a +negative+ number yields a negative+result; for example, 2%2A%28-3%29+=+-6
3.
Multiplication of a negative number by a positive number yields a negative+result; for example, %28-2%29+%2A+3+=+-6
4.
Multiplication of a negative number by a +negative+ number yields a +positive++result; for example, %28-2%29+%2A%28-3%29=+6
Or, we can use only sign to write these rules:
1.(+)*(+)=(+)
2. (+)*(-)=(-)
3. (-)*(+)=(-)
4. (-)*(-)=(+)


Multiply %2810%29%286%29%28-9%29=+60%28-9%29=+-540