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28:2+39= 66:3-13= (46+23):3= (100-16):7=
200-72:6= 346+75:5= 4x23-38:2= 57x3+15x5=


Răspuns :

28:2+39=14+39=53
66:3-13=22-13=9
(46+23):3=69:3=23
(100-16):7=84:7=12