Вычислите устно:
а) $\snippet{name: op_column_rows, args: ['15 * 6', ': 18', '* 19', '+ 6'], solution: '?'}$;
б) $\snippet{name: op_column_rows, args: ['100 - 19', ': 3', '+ 23', '* 4'], solution: '?'}$;
в) $\snippet{name: op_column_rows, args: ['60 - 11', ': 7', '* 15', '- 25'], solution: '?'}$;
г) $\snippet{name: op_column_rows, args: ['88 - 19', ': 23', '* 15', '+ 55'], solution: '?'}$;
д) $\snippet{name: op_column_rows, args: ['80 - 16', ': 8', '* 11', '+ 22'], solution: '?'}$.