Question

show the calculator answer, significant digits answer and identify the number of significant digits. show all work.
350.0 - 200

make it more clear.

Answer 1

To solve the problem \( 350.0 - 200 \) and to present the answer with the proper significant digits, we can follow these steps:

### Step 1: Perform the Calculation

First, perform the subtraction:

\[
350.0 - 200 = 150.0
\]

### Step 2: Determine Significant Digits

**Significant Digits for Each Number:**

1. **350.0** has **4 significant digits**:
- The **"3"**, **"5"**, **"0"**, and the trailing **"0"** after the decimal point are all significant.

2. **200** has **1 significant digit** (assuming it is written without a decimal).
- The **"2"** is significant, while zeroes in this instance are not counted as significant because there is no decimal present.

### Step 3: Apply Significant Digit Rules to the Result

When performing addition or subtraction, the result should be rounded to the least number of decimal places of any number in the operation.

- **350.0** has **1 decimal place**.
- **200** has **0 decimal places**.

Thus, we take the least, which is **0 decimal places**.

### Step 4: Round the Result

The result of \( 150.0 \) has 1 decimal place (which is the decimal part of the larger number 350.0), so we will round \( 150.0 \) to **150** (without the decimal).

### Final Answer Summary

- **Calculator Answer:** \( 150.0 \)
- **Final Significant Digits Answer:** \( 150 \)
- **Number of Significant Digits in Final Answer:** \( 2 \) (from the digits "1" and "5").

**Conclusion:**

The answer to the subtraction \( 350.0 - 200 \) is \( 150 \) with **2 significant digits**.