a=2.4; b=2.4; c=a+b # da 2+2=5.py 1 april 2020
print (round(a),"+", round(b), "=", round(c))
d=-2.4; a=-2.4; v=d+a # da -2-2=-5
print (round(d), round(a), "=", round(v))
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