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Multiplying Negative Numbers


Rules for Multiplying Negatives

We may have positive and negative numbers when doing with entities in multiplication. There are some common rules for multiplying numbers.

Example
 Multiplying Negative Numbers two positive signs make a positive sign: plus 4 × 5 = 20
minus   two negatives signs make a positive signs: plus  (−4) × (−5) = 20
a negative signs and positive signs
make a negative sign:
(−4) × 5 = −20
  positive signs and negative signs
make a negative sign:
4 × (−5) = −20

Note

  • As we know that “+” is the positive sign
  •  And “” is the negative sign.
  • When a number has no sign, it normally indicates it’s positive.

For example, 6 is really +6

We can use pair of brackets () around the numbers to avoid confusion.

For example, 6 × −5 can be written as 6 × (−5)

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