Solve Decimal Subtraction: 1.5 - 0.7 Step-by-Step

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

• Step 1: Identify the given numbers 1.5 and 0.7.

• Step 2: Align the decimal points of the numbers.

• Step 3: Subtract the numbers digit by digit from right to left.

Now, let's work through each step:
Step 1: The problem gives us the numbers 1.5 and 0.7, which need to be subtracted from each other.
Step 2: Write them vertically one on top of the other, aligning the decimal points:
    $1.5$
$- 0.7$
Step 3: Subtract from right to left starting from the tenths place. In the tenths place, subtract $7$ from $5$, which requires borrowing since 5 < 7.
- Borrow 1 from the units place of $1.5$, making it $0.5 + 1.0 = 10.5$, and giving the tenths place $15$
- Now we have:
    $(1.0 - 0.1)$ in the units, and $15 - 7 = 8$ in the tenths.
our expression becomes 0.8 after subtraction.

Therefore, the solution to the problem is $0.8$.