Decimal Subtraction Using Grid Models: Solving Minus 0.6 with Visual Representation

To solve the problem, we need to interpret the given graphical representation:

• The first rectangular grid area represents a certain decimal value. We assume this value to be 1.2 based on the typical decimal representation in similar grid problems (e.g., a grid consisting of 10 equal parts where 12 parts would represent 1.2).
• The second action is the subtraction operation represented by subtracting 0.6 from this value.

Let's perform the subtraction:

• Write the decimals with their points aligned: $1.2 - 0.6$.
• Since these decimals are accurately aligned by their points, subtract the tenths: $1.2 - 0.6 = 0.6$.

The result of subtracting 0.6 from 1.2 results in:

$0.6$

Thus, choice 4, which equates to $0.6$, is the correct answer.