Question

find the product of (-20)×(-2)×(-5)×7

Answer 1

(-20)×(-2)×(-5)×7
=40. * -35
= - 1400

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Answer 2

Given : The given multiplication work is, (-20)×(-2)×(-5)×7

To find : The answer to the given multiplication.

Solution :

We can simply solve this mathematical problem by using the following mathematical process. (our goal is to calculate the answer to the given multiplication)

Now, the multiplication will be :

= (-20)×(-2)×(-5)×7

= [(-20) × (-2)] × (-5) × 7

= 40 × (-5) × 7

= 40 × [(-5) × 7]

= 40 × (-35)

= -1400

(This will be considered as the final result.)

Used rules of sign convention :

• (-ve number) × (-ve number) = +ve number
• (-ve number) × (+ve number) = -ve number
• (+ve number) × (-ve number) = -ve number

[-ve means negative ; +ve means positive]

Hence, the answer to the multiplication is -1400