5-determine o numero desconhecido em cada item: a) _____ - 1/4 =0,2
b)_____ + 11/13 =5/2
c)____ * 0,4=3/8
d)___ : 2,4=3/5
e)2,4 * ____ =6
f)-0,3 + ___ = -5/9
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