Answered

Calculer les expression numériques suivantes :
A = 12 + [3 x [5+ (4 × 7) + 2]] + (8 × 3)
X
B
25 [12 (3+4)]
C= 81+ [(7+21) - 13] (17-9)
D = [(7,8 4,5) +11] × (4+3)
E = 6+ [(7 x 2) - (1,1 × 2)]
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Sagot :

Bonjour,

Les parenthèses d'abord

priorité aux multiplications

A = 12 + [3 x [5+ (4 × 7) + 2] + (8 × 3)

= 12 + [3 x [5+ 28 + 2] + 24

Les crochets:

= 12 + [3 x [35] + 24

12 + 105 +24

= 141

B= 25 [12 (3+4)]

= 25 [12 *7]

=25* 19

= 475

C= 81+ [(7+21) - 13] (17-9)

= 81+ [(28) - 13] (8)

= 81+ [15]* (8)

= 81 + 120

= 201

D = [(7,8+ 4,5) +11] × (4+3)

= [(12,3 ) +11] × (7)

= 23,3 x7

= 163,1

E = 6+ [(7 x 2) - (1,1 × 2)]

= 6+ [(14) - (2,2)]

=  6+ [14,22]

= 6+ 14,22

= 20,22