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Réponse:

-5×103+5×10-3

= -515+5×10-3

= -515+50-3

= -468

-5×103-5×10-3

= -515-5×10-3

= - 515-50-3

= -568

(-5×103)×(5×10-3)

= (-5×103)= -5×103

= -5×103(5×10-3)

= -515(5×10-3)

= 5×10-3=47

= -515×47

= - 24205

(-5×10^3)/(5×10^(-3))

= 5×10³5×10-³

= 10³/10-³

= 10³/10-³=10³-(-3)

= 10³-(-3)

= -10⁶

= 1000000

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