Changes

== Knows the inverse relationship of multiplication and division ==

== Knows the inverse relationship of multiplication and division ==

<gallery>

<gallery>

File:Sliderule-inverse.png|Napier's bones

File:Sliderule-inverse.png|Slide ruler

File:Napier-bones.png|Napier's bones

File:TurtleArt-inverse.png|Turtle Art project

File:TurtleArt-inverse.png|Turtle Art project

</gallery>

</gallery>