Enteros - Cepasanfrancisco.edurioja.org

4Soluciones a las actividades de cada epígrafe
b) 7 + (2 – 8) = 7 + (–6) = 7 – 6 = 1
7 + (2 – 8) = 7 + 2 – 8 = 9 – 8 = 1
c) 12 + (–3 + 10) = 12 + (+7) = 12 + 7 = 19
12 + (–3 + 10) = 12 – 3 + 10 = 22 – 3 = 19
d) 15 – (8 + 11) = 15 – (+19) = 15 – 19 = –4
15 – (8 + 11) = 15 – 8 – 11 = 15 – 19 = –4
e) +(9 – 10) – 2 = 9 – 10 – 2 = 9 – 12 = –3
+(9 – 10) – 2 = +(–1) – 2 = –1 – 2 = –3
f) –(7 + 4) + 14 = –(+11) + 14 = –11 + 14 = 3
–(7 + 4) + 14 = –7 – 4 + 14 = –11 + 14 = 3
g) (5 + 8) – (7 + 6) = (+13) – (+13) = 13 – 13 = 0
(5 + 8) – (7 + 6) = 5 + 8 – 7 – 6 = 13 – 13 = 0
h) (16 – 9) – (10 – 7) = (+7) – (+3) = 7 – 3 = 4
(16 – 9) – (10 – 7) = 16 – 9 – 10 + 7 = 23 – 19 = 4
PÁGINA 84
5 Quita los paréntesis.
a) +(+2) b) +(–8) c) –(+4)
d) –(–9) e) –(+5) f) +(–12)
g) +(–14) h) +(+15) i) –(+25)
a) +(+2) = +2 b) +(–8) = –8 c) –(+4) = –4
d) –(–9) = +9 e) –(+5) = –5 f) +(–12) = –12
g) +(–14) = –14 h) +(+15) = +15 i) –(+25) = –25
6 Quita el paréntesis y calcula igual que se ha hecho en el ejemplo.
• 16 – (–5) = 16 + 5 = 21
a) 12 + (+4) b) 8 + (+3) c) 10 – (+8)
d) 15 – (–6) e) 13 – (+9) f) 9 + (–1)
g) 2 – (+8) h) 3 – (–5) i) 4 + (–10)
j) 10 – (+16) k) 15 – (+25) l) 30 – (–12)
a) 12 + (+4) = 12 + 4 = 16 b) 8 + (+3)= 8 + 3 = 11
c) 10 – (+8) = 10 – 8 = 2 d) 15 – (–6) = 15 + 6 = 21
e) 13 – (+9) = 13 – 9 = 4 f) 9 + (–1) = 9 – 1 = 8
g) 2 – (+8) = 2 – 8 = –6 h) 3 – (–5) = 3 + 5 = 8
i) 4 + (–10) = 4 – 10 = –6 j) 10 – (+16) = 10 – 16 = –6
k) 15 – (+25) = 15 – 25 = –10 l) 30 – (–12) = 30 + 12 = 42
Unidad 4. Los números enteros
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