Sagot :
Exercice 58
A=3*6+7*6=18+42=60
ou (3+7)*6=10*6=60
B=0.8*8-8*0.2=6.4-1.6=4.8
ou (0.8-0.2)*8=0.6*8=4.8
C=6*0.1+9*0.1=0.6+0.9=1.5
ou (6+9)*0.1=15*0.1=1.5
D=14*20-20*3=280-60=220
ou (14-3)*20=11*20=220
E=16*0.5-9*0.5+43*0.5=8-4.5+21.5=25
ou (16-9+43)*0.5=50*0.5=25
F=116*4.31+4.31*22-4.31*38=499.96+94.82-163.78=431
ou (116+22-38)*4.31=100*4.31=431
Exercice 59
E=5.2*3+5.2*5.2
=5.2(3+5.2)
=5.2*8.2
F=4.9*12-12*4.9
=(4.9-4.9)*12=0
ou 4.9(12-12)=0
G=7*1+4.5*7
=7(1+4.5)
=7*5.5
H=3*100-3*10+3
=3*10*10-3*10+3
=3(10*10-1*10+1)
=3(100-10+1)
=3*91
I=7.2*3+7.2*8.5+7.2
=7.2(3+8.5+1)
=7.2*12.5
J=100*5.9-100*3*100
=100(5.9-3*100)
=100(5.9-300)
=100*(-294.1)
K=7.7+7.7*13-7.7*7.7-7.7+3*7.7
=7.7(1+13+7.7-1+3)
=7.7*(16+7.7)
=7.7*23.7
A=3*6+7*6=18+42=60
ou (3+7)*6=10*6=60
B=0.8*8-8*0.2=6.4-1.6=4.8
ou (0.8-0.2)*8=0.6*8=4.8
C=6*0.1+9*0.1=0.6+0.9=1.5
ou (6+9)*0.1=15*0.1=1.5
D=14*20-20*3=280-60=220
ou (14-3)*20=11*20=220
E=16*0.5-9*0.5+43*0.5=8-4.5+21.5=25
ou (16-9+43)*0.5=50*0.5=25
F=116*4.31+4.31*22-4.31*38=499.96+94.82-163.78=431
ou (116+22-38)*4.31=100*4.31=431
Exercice 59
E=5.2*3+5.2*5.2
=5.2(3+5.2)
=5.2*8.2
F=4.9*12-12*4.9
=(4.9-4.9)*12=0
ou 4.9(12-12)=0
G=7*1+4.5*7
=7(1+4.5)
=7*5.5
H=3*100-3*10+3
=3*10*10-3*10+3
=3(10*10-1*10+1)
=3(100-10+1)
=3*91
I=7.2*3+7.2*8.5+7.2
=7.2(3+8.5+1)
=7.2*12.5
J=100*5.9-100*3*100
=100(5.9-3*100)
=100(5.9-300)
=100*(-294.1)
K=7.7+7.7*13-7.7*7.7-7.7+3*7.7
=7.7(1+13+7.7-1+3)
=7.7*(16+7.7)
=7.7*23.7