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Efectuati: a)3,5x10-27,3=
b)4,3x5+2,5=
c)13,2+5,4x8=
d)13,2+5,4x8=
e)20-0,47x5=
f)57:2,5-0,31x20=
Va rog ajutatima.


Răspuns :

b) 4,3x5+2,5=21,5+2,5=24        a)3,5x10-27,3=35-27,3=7,7
c)13,2+5,4x8=13,3+43,2=56,4
d) 13,2+5,4x8=56,4
e)20-0,47x5=20-2,35=17,65
f)57:2,5-0,31x20=22,8-6,2=16,6