Sagot :
a = 160-(3x5²-6x7)
=160-(3x25-6x7)
=160-(75-42)
= 160-33=127
C = 2x10²-4x(5-5²)
= 2x100-4x(5-25)
= 200-4x(-20)
=200-(-80)=200+80=280
D = 3x4²-72/3²
=3x16-72/9
=48-8=40
B = 142-(50-3x6²)
= 142-(50-3x36)
=142-(50-108)
= 142-(-58)
=142+58=200
=160-(3x25-6x7)
=160-(75-42)
= 160-33=127
C = 2x10²-4x(5-5²)
= 2x100-4x(5-25)
= 200-4x(-20)
=200-(-80)=200+80=280
D = 3x4²-72/3²
=3x16-72/9
=48-8=40
B = 142-(50-3x6²)
= 142-(50-3x36)
=142-(50-108)
= 142-(-58)
=142+58=200
A=160-(3x25-6x7)
A=160-(75-42)
A=160-33
A=127
C=2x100-4(5-25)
C=200-4x(-20)
C=200-(-80)
C=200+80=280
D=3x16-72/9
D=48-8=40
B=142-(50-3x36)
B=142-(50-108)
B=142-(-58)
B=142+58=200
A=160-(75-42)
A=160-33
A=127
C=2x100-4(5-25)
C=200-4x(-20)
C=200-(-80)
C=200+80=280
D=3x16-72/9
D=48-8=40
B=142-(50-3x36)
B=142-(50-108)
B=142-(-58)
B=142+58=200
