Question

Basic rules of multiplication =
(1) (+) ×(+) =(+) (3) (–) × (+) = (–)
(2) (–) ×(–) =(+) (4) (+) × (–) = (–)

Basic rules of additions
(1) (+) + (+) = (+)
(2) (–) + (–) = (–)

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Answer 1

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Answer 2

Answer:

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Step-by-step explanation:

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