Вычислите устно:
а) $\snippet{name: op_column_rows, args: ['50 + 40', ': 30', '* 50', '- 100'], solution: '?'}$;
б) $\snippet{name: op_column_rows, args: ['100 - 70', '* 3', '- 18', ': 36'], solution: '?'}$;
в) $\snippet{name: op_column_rows, args: ['67 - 23', ': 11', '* 25', '- 19'], solution: '?'}$;
г) $\snippet{name: op_column_rows, args: ['30 + 70', ': 10', '* 15', '- 150'], solution: '?'}$;
д) $\snippet{name: op_column_rows, args: ['100 - 80', ': 4', ' * 14', '- 67'], solution: '?'}$.