Respuesta:
a)10 b)17 c) 16 d)5 e)10
f)-10
Explicación paso a paso:
a)19-(-3) x (5-8)
19+3 x (-3)
19-9
10
b)12 + (–5) · [8 + (–9)]
12 + (–5) · (8-9)
12 + (–5) · (-1)
12+5
17
c) 12 – [13 – (–7)] : (–5)
12 – (13+7): (-5)
12-20: (-5)
12+4
16
d)10 – (+20) : [7 + (–3)]
10-20 :(7-3)
10-20:4
10-5
5
e)(–2) · (5 – 7) – (–3) · (8 – 6)
(-2)·(-2)+3·2
2·2+3·2
2(2+3)
2·5
10
