Sagot :
Réponse :
Bonjour,
Exercice 3 :
A=25-8-14+7 B=-9-20+17+3 C=-75+42+16-23
=17-14+7 =-29+17+3 =-33+16-23
=3+7 =-12+3 =-17-23
=10 =-15 =-40
D=11-16-5+2 E=15-4+19-31 F=-13+10+9-1
=-5-5+2 =11+19-31 =-3+9-1
=-10+2 =30-31 =6-1
=-8 =-1 =5
Exercice 4 :
A=9-4+(6-11)-(-8+3-2) B=-16-(7-15+4)-(-5+12)
=9-4-5-(-5-2) =-16-(-8+4)-7
=9-4-5+7 =-16+4-7
=5-5+7 =-12-7
=0+7 =-19
=7
C=7-5+(2-3)-(-7+5-3) D=-10-(5-3+2)-(-13+12)
=7-5-1-(-2-3) =-10-(2+2)+1
=7-5-1+5 =-10-4+1
=2-1+5 =-14+1
=1+5 =-13
=6
Explications étape par étape