a) 2 – 4 – 5 + 8 = – 2 – 5 + 8 =

– 7 + 8 = +1

b) 6 – 7 + 4 – 3 =

c) 5 + 8 – 9 – 6 =

d) –4 – 9 + 6 + 2 =

e) –3 – 5 + 7 + 7 =

f) –4 – 8 – 2 – 5 =​

Respuestas

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a) 2 – 4 – 5 + 8 = –2 – 5 + 8 = –7 + 8 = +1

b) 6 – 7 + 4 – 3 = –1 + 4 – 3 = 3 – 3 = 0

c) 5 + 8 – 9 – 6 = 13 – 9 – 6 = 4 – 6 = –2

d) –4 – 9 + 6 + 2 = –13 + 6 + 2 = –7 + 2 = –5

e) –3 – 5 + 7 + 7 = –8 + 7 + 7 = –1 + 7 = 6

f) –4 – 8 – 2 – 5 = –12 – 2 – 5 = –14 – 5 = –19
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