Bonjour ,
a)
= (+19) + (-8) = +11
b)
(-13) +(+ 5) = -8
c)
(-14) + (-9) = -23
d)
(+4) +(+11) = +15
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Bonjour ,
a)
= (+19) + (-8) = +11
b)
(-13) +(+ 5) = -8
c)
(-14) + (-9) = -23
d)
(+4) +(+11) = +15