When we estimate, we guess but with some calculation.
In this activity, you must estimate which number the arrow is pointing to on the number line.
Estimate which number the arrow is pointing to.
In your mind, picture where the halfway number 5 is.
In your mind, picture the small number divisions between 0, 5 and 10.
The arrow is pointing to one mark before 5, which is 4.
Shall we have a go at some questions?