porfa ayudenme es mara ahorita 19 –(–3) · [5 –(+8)]= b)12 + (–5) · [8 + (–9)]= c)12 –[13 –(–7)] : (–5) = d)10 –(+20) : [7 + (–3)]= e)(–2) · (5 –7) –(–3) · (8 –6)= f)(9 –6) · (–2) + (13 + 3) : (–4)=
Respuestas
Respuesta:
Explicación paso a paso:
a) 19 –(–3) · [5 –(+8)] = 19 –(–3) · [5 –8]
= 19 –(–3) · [-3]
= 19 –(–9)
= 19 + 9
= 28
b) 12 + (–5) · [8 + (–9)] = 12 + (–5) · [–1)]
= 12 + (+5)
= 17
c) 12 –[13 –(–7)] : (–5) = 12 –[13 + 7)] : (–5)
= 12 –(20) : (–5)
= 12 –(–4)
= 12 + 4
= 16
d) 10 –(+20) : [7 + (–3)] = (10 –20) : (7 –3)
= –10 : 4
= -2,5
e) (–2) · (5 –7) –(–3) · (8 –6) = (–2) · (-2) – (–3) · (2)
= (4) – (–6)
= (4 + 6)
= 10
f) (9 –6) · (–2) + (13 + 3) : (–4) = (3) · (–2) + (16) : (–4)
= (–6) + (–4)
= –10