Question

Opera:
a) 8 + (4 – 9 + 7) · 2 + 4 · (3 – 8 + 4) =
b) 4 · [(+5) + (–7)] – (–3) · [7 – (+3)] =
c) (–3) · (+11) – [(–6) + (–8) – (–2)] · (+2) =
d) (–6) · [(–7) + (+3) – (7 + 6 – 14)] – (+7) · (+3) =

Answer 1

Respuesta:a=53 b=10 c=-21 d=74

Explicación paso a paso:

Answer 2

Respuesta:

a,8    b,4   c,-9    d,-39

Explicación paso a paso:

a) 8 + (4 – 9 + 7) · 2 + 4 · (3 – 8 + 4) = 8 + (-5 + 7) · 2 + 4 · (-5 + 4)=8 + (2) · 2 + 4 · (-1)=8+4+(-4)=8

b) 4 · [(+5) + (–7)] – (–3) · [7 – (+3)] = 4 · [5 –7] +3 · [7 – 3]=4(-2)+3(4)=-8+12=4

c) (–3) · (+11) – [(–6) + (–8) – (–2)] · (+2) = –33 – [–6 –8 +2] · (+2) =-33-(-12).2=-33+12.2=-33+24=-9

d) (–6) · [(–7) + (+3) – (7 + 6 – 14)] – (+7) · (+3) =–6 · [–7 +3 – (-1)] – 21 =-6. [-3]-21=-18-21=-39