Decimal Addition and Subtraction Practice Problems

Let's solve the subtraction problem step by step:

• Step 1: Align the decimal numbers. The subtraction is $1.8 - 0.9$. Both numbers have their decimal points aligned.
• Step 2: Subtract the numbers starting from the tenths place: $8$ (in $1.8$) minus $9$ (in $0.9$). This requires borrowing.
• Step 3: Regroup, take $1$ from the units place of $1.8$, which then becomes $0.8 + 10$ (or $10$ tenths), thus $18$ tenths. Subtract $9$ tenths from $18$ tenths, resulting in $9$ tenths.
• Step 4: The units digit of $1.8$ now, after borrowing, is $0$. There is nothing left to subtract, so the remaining digit in the unit place remains $0$.
• Step 5: Therefore, the answer obtained is $0.9$.

Thus, the solution to the problem is $\mathbf{0.9}$.

To solve this problem, start by re-evaluating the appearance of this problem statement:

• This visually seems to indicate finding a valid operation setup with the choice alternatives.

Since the intention is seeming to lead to an operation like:

• Identify that two blocks represent this subtraction problem, further confirming with operation balance $0.15 - 0.8$.
• Translate this problematically as trying different $x$ ensuring subtraction $x - 0.8$, achieves a valid metric.
• Among choices look into possible well-matching 0.7

Breaking down and confirming,

• $0.7 - 0.8 = 0$: Provides true balance operational correctness reaching through rest items.

Therefore, the correct answer for the problem based on range and method assessment is $0.7$, also the third choice.

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.

To solve this problem, we'll follow these steps:

• Step 1: Align the decimal numbers $1.6$ and $0.7$ by their decimal points.
• Step 2: Perform the subtraction starting from the rightmost digit.
• Step 3: Record the result.

Now, let's work through each step:
Step 1: Align the numbers:
$\phantom{00}1.6$
$- \phantom{0}0.7$

Step 2: Perform the subtraction:
Subtract $0.7$ from $1.6$, digit by digit.

The whole number column $(1 - 0)$ gives $1$, and the tenths column $(6 - 7)$ requires borrowing:
- Convert $1.6$ to $1.5 + 0.1$ which equals $16 - 7$ in tenths.

Subtracting $7$ from $16$ gives $9$.

Thus, our final result is $0.9$.

Therefore, the solution to the problem is $0.9$.

To solve this problem, we'll follow these steps:

• Step 1: Identify the value represented by the graphical box. In this context, we assume it likely represents the number $2$.
• Step 2: Subtract $0.3$ from this number, with care for decimal place alignment.
• Step 3: Calculate the result of the subtraction: $2 - 0.3 = 1.7$.

Now, let's work through the detailed steps:
Step 1: Assume and verify within graphical representation contexts that the initial number is likely $2$.
Step 2: Align decimals and perform the subtraction operation:
$2.0 - 0.3$: Ensure placeholder zero for two decimal spaces.
Step 3: Subtraction takes place across decimals: $2.0 - 0.3 = 1.7$.

Therefore, the solution to the problem is $1.7$, which matches choice 1.