Find the approximate value of (?) in the following questions.
513.89 - 122.11 + 56.987 + 221.123 = ?

Options

A. 670
B. 690
C. 780
D. 730

Answer

To find the approximate value of the expression \( 513.89 - 122.11 + 56.987 + 221.123 \), we can follow these steps:

### Step 1: Round each number to the nearest whole number
- \( 513.89 \) rounds to \( 514 \)
- \( 122.11 \) rounds to \( 122 \)
- \( 56.987 \) rounds to \( 57 \)
- \( 221.123 \) rounds to \( 221 \)

### Step 2: Rewrite the expression with the rounded values
Now we can rewrite the expression using the rounded values:
\[ 514 - 122 + 57 + 221 \]

### Step 3: Perform the addition first
Add the positive numbers together:
\[ 514 + 57 + 221 \]
Calculating this step-by-step:
1. \( 514 + 57 = 571 \)
2. \( 571 + 221 = 792 \)

### Step 4: Subtract the negative number
Now, subtract \( 122 \) from \( 792 \):
\[ 792 - 122 \]
Calculating this:
1. \( 792 - 122 = 670 \)

### Conclusion
The approximate value of the expression \( 513.89 - 122.11 + 56.987 + 221.123 \) is \( 670 \).

### Final Answer
Thus, the answer is \( \boxed{670} \).

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