Вычислите устно:
а) $\snippet{name: op_column_rows, args: ['50 * 10', ': 125', '* 75', '- 160'], solution: '?'}$;
б) $\snippet{name: op_column_rows, args: ['300 : 60', '* 40', ': 50', '* 19'], solution: '?'}$;
в) $\snippet{name: op_column_rows, args: ['12 + 0,6', ': 3', '- 0,2', '* 2,5'], solution: '?'}$;
г) $\snippet{name: op_column_rows, args: ['1 - 0,4', '* 5', '-0,5', ': 5'], solution: '?'}$;
д) $\snippet{name: op_column_rows, args: ['0,7 - 0,06', ': 8', '* 10', ': 0,4'], solution: '?'}$.