Visualising number sense: https://nrich.maths.org/articles/thinking-through-and-visualising
How do you see it? https://nrich.maths.org/problems/how-do-you-see-it-0?tab=overview
Consider the following problems. In what ways might children visualise the operations of addition and subtraction in each problem? How might some of the rational number ideas ne promoted to visualise the operations? (use the teacher resource eight types of change Pdf, but include times as many problems, double and half/ many to one etc to create my own in line with Conferys framework).