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Sagot :

Exercice 3:

P= 18+7+9-18-9-7

P=18-18+7-7+9-9

=0

Q= -3+24617+6

Q= 24-17+6-3

Q= 10

R= 14-4+8-8+7

R=14-4+7+8-8

R=17

S=13,36+4+6-3,36

S=13,36-3,36+6+4

S=20

T=6,4+11,95-3,4+0,05

T= 6,4-3,4+11,95+0,05

T=15

U+108,23+4,6-0,6+1,77

U=108,23+1,77+4,6-0,6

U=114

Exercice 4 :

0 1 -4

-5 -1 3

2 -3 -2

-4 6 7 -7

1 -1 -2 4

-3 3 2 0

8 -6 -5 5

Si tu as des questions n'hésite pas.

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