Question

9. Calcule :
a) (+ 12 ) + ( +21)
b) ( + 13 ) + ( + 7)
. c)( +23 ) + ( +21)
d) (-12)+(-11)
e) (-23) + (-4)
1) (-21)+(-12)
g) (+10) 4 (-13)
h) (+21) + (-23)
0 (+40) + (-17)​

Answer 1

Resposta:

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