Part Part Whole

One comprehension skill is visualization and one technique for visualizing a word problem is to draw a diagram.  Teach the part-part-whole relationship (or even the part-part-part indefinitely-whole) model.  It even helps up to fifth grade for comparison problems and it's a definite go-to for ELL students.

                                     That is not quite it.  But it will get some laughs.

Ok.  This is it.  Use it with any numbers.  Part missing or whole missing.

Helps visualize number sense.