Question

NOBSONThe situation described below involves a subtraction problem. Briefly name the small cube portion of the figure below that correctlyclassifies the problem. Typical answers may be set, take-away, no comparison or measurement, missing-addend, comparison. Finally,write an equation to fit the problem.MODELYesTake Away MissingAddendAPPROACHJack is driving from St. Louis to Kansas City for a meeting, a total distance of 250 miles. After 2 hours he notices that he hastraveled 144 miles. How far is he from Kansas City at that time?

Answer 1

The distance between St. Louis and Kansas is 250 mi.

When he has travelled 144 miles, he is at 250-144=106 miles from Kansas.

The answer is 106 miles.

An equation for this model can be:

Let L be the distance left to arrive to Kansa and D the distance already travelled, we have:

`\begin{gathered} L+D=250 \\ L=250-D \end{gathered}`

When D=144, L is:

`L=250-144=106`