Question

1.803 - 0.724 = ______
1.121
0.121
2.527
1.079

Explanation:

Step1: Align decimal points

Subtract \(1.803 - 0.724\) by aligning decimals:

$$\begin{align*} 1.803\\ -0.724\\ \hline \end{align*}$$

Step2: Subtract column - by - column

Start from the rightmost digit:

• Thousandths place: \(3 - 4\) (can't do, borrow from hundredths: \(0\) becomes \(10\), then borrow from tenths: \(8\) becomes \(7\), hundredths \(10\) becomes \(9\), thousandths \(13 - 4 = 9\))
• Hundredths place: \(9 - 2 = 7\)
• Tenths place: \(7 - 7 = 0\)
• Ones place: \(1 - 0 = 1\)

Result: \(1.803 - 0.724 = 1.079\)? Wait, no, let's recalculate:

Wait, correct subtraction:

\(1.803 - 0.724\):

• Ones: \(1 - 0 = 1\)
• Tenths: \(8 - 7 = 1\)
• Hundredths: \(0 - 2\) (borrow from tenths: \(8\) becomes \(7\), \(0\) becomes \(10\), then \(10 - 2 = 8\)? No, wait, original number is \(1.803\), so digits:

Ones: \(1\), Tenths: \(8\), Hundredths: \(0\), Thousandths: \(3\)

Subtract \(0.724\): Ones: \(0\), Tenths: \(7\), Hundredths: \(2\), Thousandths: \(4\)

So:

Thousandths: \(3 - 4\) → borrow from hundredths: hundredths is \(0\), so borrow from tenths: tenths \(8\) becomes \(7\), hundredths \(0\) becomes \(10\), then borrow from hundredths to thousandths: hundredths \(10\) becomes \(9\), thousandths \(3\) becomes \(13\). So \(13 - 4 = 9\)

Hundredths: \(9 - 2 = 7\)

Tenths: \(7 - 7 = 0\)

Ones: \(1 - 0 = 1\)

Wait, that gives \(1.079\), but let's check with another approach: \(1.803 - 0.724 = 1 + 0.803 - 0.7 - 0.024 = 1 + 0.103 - 0.024 = 1 + 0.079 = 1.079\). But wait, the options have \(1.079\) as a choice (the last one with the triangle). Wait, but let's re - check the subtraction:

Wait, \(1.803 - 0.724\):

\(1.803 - 0.7 = 1.103\)

\(1.103 - 0.024 = 1.079\)

Yes, so the correct answer is \(1.079\) (the option with the triangle, but let's check the options:

Wait, the options are:

1.121

0.121

2.527

1.079 (with triangle)

So the correct calculation is \(1.803 - 0.724 = 1.079\)

Answer:

1.079 (the option with the triangle, or as per the options, the last one: 1.079)