Answered

70 Calculer.
A=-3+ 4(-5+7)
B=-6-5 (8:2-3)
C = (-5) × (-4) -(10 - 14) x 3

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COMPTECOMPTE0501

Réponse:

A= 3+4(-5+7)

=3+4(+2)

=7(+2)

=+14

B=-6-5(8÷2-3)

=-6-5(4-3)

=-6-5(1)

= -11 (1)

=-11

C=(-5)×(-4) -(10-14)×3

=(-5)×(-4)-(-4)×3

=+20-(-12)

=+20+12

=+32