Sagot :
Bonjour
26-(14+6-5)+(-8+7) =
26-14-6+5-8+7 = 10
10[8-17+3-(9-20)]=
10 ( 8-17+3-9+20)=
10* 5 = 50
Règle des signes:
-(-) => +
-(+) => -
+(-) => -
+(+) => +
26-(14+6-5)+(-8+7)
=26-(14+1)-1
=26-15-1
=26-16
=10
10[8-17+3-(9-20)]
=10[-9+3-(-11)]
=10(-9+3+11)
=10(-6+11)
=10(+5)
=10×5
=50