Sagot :
a=(-4)+(-9)
=-4-9
=-13
B=(+5)-(-3)
=5+3
=8
c=(-13)-(+7)
=-13-7
=-20
D=(-7)*(+3)
=-21
E=(-9)*(-5)
=45
f=4*(-7.5)
=-30
E=(-4)*(+5)*(-6)*(-4)*(-1)
=4*5*6*4*1
=20*24
=480
=-4-9
=-13
B=(+5)-(-3)
=5+3
=8
c=(-13)-(+7)
=-13-7
=-20
D=(-7)*(+3)
=-21
E=(-9)*(-5)
=45
f=4*(-7.5)
=-30
E=(-4)*(+5)*(-6)*(-4)*(-1)
=4*5*6*4*1
=20*24
=480
a=(-4)+(-9)
a=-4-9
a=-13
B=(+5)-(-3)
B=5+3
B=8
c=(-13)-(+7)
c=-13-7
c=-20
D=(-7)*(+3)
D=-21
E=(-9)*(-5)
E=45
f=4*(-7.5)
f=-30
E=(-4)*(+5)*(-6)*(-4)*(-1)
E=4*5*6*4*1
E=20*24
E=480
a=-4-9
a=-13
B=(+5)-(-3)
B=5+3
B=8
c=(-13)-(+7)
c=-13-7
c=-20
D=(-7)*(+3)
D=-21
E=(-9)*(-5)
E=45
f=4*(-7.5)
f=-30
E=(-4)*(+5)*(-6)*(-4)*(-1)
E=4*5*6*4*1
E=20*24
E=480