put together inside
cf. add: put together outside
~
William Bricken, Iconic Arithmetic Volume I: The Design of Mathematics for Human Understanding (Unary press, 2019), p. 74.
multiplyput together inside
cf. add: put together outside
~
William Bricken, Iconic Arithmetic Volume I: The Design of Mathematics for Human Understanding (Unary press, 2019), p. 74.