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La règle de la soustraction s'applique aux expressions
entre parenthèses.
Exercices 3 :
(+3) - (-5+2-3) +(+2+ 6 - 9) = ...
(+3) + (+5 - 2 + 3) +(+2+ 6-9) = ...





(+3) - ( -5 +2-3) +(+2+ 6 - 9) = 8
A = +13 - (+5 -15 + 1) - (- 9) + (-13) = ...
B=(2,5+3 -0,5) - (-2+ 7) = ...

Sagot :

Bonjour,

(+3) - (-5+2-3) +(+2+ 6 - 9) = ...

3+5-2+3+2+6-9 = 8

(+3) + (+5 - 2 + 3) +(+2+ 6-9) = ...

3+5 -2+3 +2+6-9 =  8

(+3) - ( -5 +2-3) +(+2+ 6 - 9) = 8

oui

A = +13 - (+5 -15 + 1) - (- 9) + (-13) = ...

13-5+15-1 +9-13 = 18

B=(2,5+3 -0,5) - (-2+ 7) = ...

2,5+3-0,5 +2 -7 = 0

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Réponse :

bonjour

(+3) - (-5+2-3) +(+2+ 6 - 9)

= 3 + 5 - 2 + 3 + 2 + 6 - 9

= 19 - 11

=  8

A = +13 - (+5 -15 + 1) - (- 9) + (-13)

= 13 - 5 + 15 - 1 + 9 - 13

= 24 - 6 = 18

B=(2,5+3 -0,5) - (-2+ 7)

= 2.5 + 3 - 0.5 + 2 - 7

= 7.5 - 7.5

= 0

Explications étape par étape :

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