Resposta:
Olá!
a)
= 3(1/6) - 5(1/4)
= 1/2 - 5/4
= 2/4 - 5/4
= -3/4
b)
= -2(-1/3) + 2(-1/4)
= 2/3 - 2/4
= 4(2)/12 - 3(2/12)
= 8/12 - 6/12
= 2/12
= 1/6
c)
= (-2/5)(5/4) - 2(-2/5)
= -10/20 + 4/5
= -10/20 + 16/20
= 4/20
= 1/5
d)
= (1/5)(-10) - (1/5)(-5)²
= -10/5 - 25/5
= -35/5
= -7
e)
= (-1/4)³ - (-1/2)³
= 1/64 - (-1/8)
= 1/64 + 8/64
= 9/64
f)
= (-1/3)² + (-1/3)(2)
= 1/9 - 2/3
= 1/9 - 6/9
= -5/9
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Resposta:
Olá!
a)
= 3(1/6) - 5(1/4)
= 1/2 - 5/4
= 2/4 - 5/4
= -3/4
b)
= -2(-1/3) + 2(-1/4)
= 2/3 - 2/4
= 4(2)/12 - 3(2/12)
= 8/12 - 6/12
= 2/12
= 1/6
c)
= (-2/5)(5/4) - 2(-2/5)
= -10/20 + 4/5
= -10/20 + 16/20
= 4/20
= 1/5
d)
= (1/5)(-10) - (1/5)(-5)²
= -10/5 - 25/5
= -10/5 - 25/5
= -35/5
= -7
e)
= (-1/4)³ - (-1/2)³
= 1/64 - (-1/8)
= 1/64 + 8/64
= 9/64
f)
= (-1/3)² + (-1/3)(2)
= 1/9 - 2/3
= 1/9 - 6/9
= -5/9