Arithmetic_methods.rb

p 10.div 5



p 20.between?(10, 30)
p 20.between?(30, 50)
p 1.2.between?(1.1, 1.3)

 p 10.9.to_i.class
 p 10.5.floor
 p 10.1.ceil
 p 3.141596.round(5)

 p -35.67.abs
 b=4

10 + 10