camellialaribi93

Réponse:

A=50-48

A=2

B=5-(-2)²

B=1

C=-15-9

C=-24

D=175

MitchAlexandrine2314

A)50-3×4au carré

=50-3×(4×4)

=50-3×16

=50-48

=2

B)5-(-5+3 ) au carré

5-(-5×-5)-(5×3)+(3×3)-(3×5)

5-(25-15+9-15)

5-(10+9-15)

5-(19-15)

5-(+4)

5-4

B=1

C)5×(-3)-(-3) au carré

5×3-(-3×-3)

5×3-(+9)

-15-(+9)

-15-9

C=-24