Enteros - Cepasanfrancisco.edurioja.org

4Soluciones a los ejercicios y problemas
a) 3 · (3 – 5) = –6 b) 4 · (8 – 6) = +8 c) 5 · (8 – 12) = –20
d) (–2) · (7 – 3) = –8 e) (–4) · (6 – 10) = +16 f) (–5) · (2 – 9) = +35
g) 16 : (1 – 5) = –4 h) (–35) : (9 – 2) = –5 i) (–14) : (5 + 2) = –2
j) (2 – 8) : 3 = –2 k) (5 + 7) : (–4) = –3 l) (12 – 4) : (–2) = –4
28 Opera estas expresiones:
a) 35 + 7 · (6 – 11) b) 60 : (8 – 14) + 12
c) (9 – 13 – 6 + 9) · (5 – 11 + 7 – 4)
d) (6 + 2 – 9 – 15) : (7 – 12 + 3 – 6)
e) –(8 + 3 – 10) · [(5 – 7) : (13 – 15)]
a) 35 + 7 · (6 – 11) = 0
b) 60 : (8 – 14) + 12 = +2
c) (9 – 13 – 6 + 9) · (5 – 11 + 7 – 4) = +3
d) (6 + 2 – 9 – 15) : (7 – 12 + 3 – 6) = +2
e) –(8 + 3 – 10) · [(5 – 7) : (13 – 15)] = –1
30 Calcula, paso a paso, como en el ejercicio resuelto anterior.
a) (–3) · [(–9) – (–7)] b) 28 : [(–4) + (–3)]
c) [(–9) – (+6)] : (–5) d) (–11) – ( – 2) · [15 – (+11)]
e) (+5) – (–18) : [(+9) – (+15)]
f) (–4) · [(–6) – (–8)] – (+3) · [(–11) + (+7)]
g) [(+5) – (+2)] : [(–8) + (–3) – (–10)]
a) (–3) · [(–9) – (–7)] = (–3) · [–2] = +6
b) 28 : [(–4) + (–3)] = 28 : [–7] = –4
c) [(–9) – (+6)] : (–5) = [–15] : (–5) = +3
d) (–11) – ( – 2) · [15 – (+11)] = (–11) – (–2) · [+4] = –11 + 8 = –3
e) (+5) – (–18) : [(+9) – (+15)] = 5 – (–18) : [–6] = 5 – 3 = 2
f) (–4) · [(–6) – (–8)] – (+3) · [(–11) + (+7)] = (–4) · [+2] – (+3) · [–4] =
= –8 + 12 = 4
g) [(+5) – (+2)] : [(–8) + (–3) – (–10)] = [+3] : [–1] = +3
31 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)
a) 8 + (4 – 9 + 7) · 2 + 4 · (3 – 8 + 4) = 8
b) 4 · [(+5) + (–7)] – (–3) · [7 – (+3)] = 4
c) (–3) · (+11) – [(–6) + (–8) – (–2)] · (+2) = 9
d) (–6) · [(–7) + (+3) – (7 + 6 – 14)] – (+7) · (+3) = –3
Unidad 4. Los números enteros
Pág. 6