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Calculeaza :
A = (+9)×(+7)
B = (+6)×(+13)
E= (-8)×(+12)
F= (-16)×(-5)
I= ( -4)×(-4)
J= (+13)×(+13)


Răspuns :

A=(+9)×(+7)

A=63

B=(+6)×(+13)

B=78

E=(-8)×(+12)

E=-96

F=(-16)×(-5)

F=80

I=(-4)×(-4)

I=16

J=(+13)×(+13)

J=169

A = ( + 9 ) × ( + 7 )

A = 63

B = ( + 6 ) × ( + 13 )

B = 78

E = ( - 8 ) × ( + 12 )

E = - 96

F = ( - 16 ) × ( - 5 )

F = 80

I = ( - 4 ) × ( - 4 )

I = 16

J = ( + 13 ) × ( + 13 )

J = 169