working2.rb

require 'bigdecimal'
 
class Float
  [:+, :-, :/, :*].each do |op|
    define_method(op) do |other|
      BigDecimal.new(self.to_s).
        send(op, BigDecimal.new(other.to_s))
    end
  end
end
 
a = 1.2
b = 1.0
c = 0.2
 
puts a - b == c
puts a * 10 - b * 10 == c * 10
 
b = BigDecimal.new("1.0")
puts a - b == c
puts a * 10 - b * 10 == c * 10