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Sagot :

MADALENARUTH84

Explications étape par étape:

1)Calculer

(‐8)×16= 16×(‐5)= ‐80

=16×(‐3)=48

=-128

(‐4)×(‐6,5)= ‐4×(‐6)= 24

=(‐4)×(‐0,5)=2

=26

6×(‐15)= 6×(‐10)= ‐60

=6×(‐5)= ‐30

=‐90

(‐7)×(‐12)= ‐7×(‐10)=70

= ‐7×(‐2)=14

=84

2) Calculer

A= 8‐8×5= ‐32

B= 9×4+4= 40

C= 4×5×3‐ 6+2×3= 4×5×3=60

= 60+3×2= 66

=66‐6=60

D=7×3×(‐5)+2×(‐11)×4=7×3×(‐5)=-105

=2×(‐11)×4= -88

105+88=‐193

3(Calculer

E=13+[‐5×(1‐17)+3]×(‐3)=13+[‐5×(‐16)+3]×(‐3)

=13+(80+3)×(‐3)

= 13+(‐249)

= ‐236

STEPHANIE1976
1)a,(-8)x16=-128
b,(-4)x(-6,5)=-26
c,(-7)x(-12)=-84

2)A=8-8x5 B=-9x4+4.
A=-8x5+8. B=-36+4
A=-40+8. B=-40
A=-48

C=-4x5x3-6+2x3
C=-20x3-6+2x3
C=-60-6+2x3
C=-66+2x3
C=6-66
C=-60

D=-7x3x(-5)+2x(-11)x4
D=-21x(-5)+2x(-11)x4
D=-105+2x(-11)x4
D=-107x(-11)x4
D=-1177x4
D=-4708

3)E=13+[-5x(1-17)+3]x(-3)
E=13+[-5x(-16)+3]x(-3)
E=13+[-80+3]x(-3)
E=13+(-83)x3
E=-70x3
E=-210


F=127-[12:(-4)-(1-4x0,5)]:2
F=127-[12:(-4)-1,5]:2
F=127-[-3-1,5]:2
F=127-4,5:2
F=127-2,25
F=124,75

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