Răspuns:
d) a : 5 = 231 rest 2
a = 231 × 5 + 2
a = 1155 + 2
a = 1157
e) 211 : a = 3 rest 1
a = (211 - 1 ) : 3
a = 210 : 3
a = 70
g) 299 : a = 3 rest 2
a = ( 299 - 2 ) : 3
a = 297 : 3
a = 99
h) 599 : a = 9 rest 5
a = ( 599 - 5 ) : 9
a = 594 : 9
a = 66