Respuestas

2014-02-06T00:35:12+01:00
a)
(2 + 3) + 5 = 10
(5 + 3) + 2 = 10
b)
(-3 + 4) + 5 = 6
(4 + 5) – 3 = 6
c)
(7 + 8) + 15 = 30
(8 + 15) + 7 = 30
d)
(5 + 7) + (-2 + 8) = 18
(5 + 8) + (-2 + 7) = 18
e)
(23 + 95) + 35 = 153
(35 + 23) + 95 = 153