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The question asks for the missing value in the estimation for the subtraction:

\[
0.426 - 0.183 \approx 0.4 - \_\_\_
\]

### Steps to Solve:

1. **Round the numbers**:
   - \( 0.426 \) rounds to \( 0.4 \)
   - \( 0.183 \) rounds to \( 0.2 \)

2. **Set up the estimation**:
   We are estimating:
   \[
   0.426 - 0.183 \approx 0.4 - \_\_\_
   \]
   To make the left side and right side equal, we need to figure out the difference:
   \[
   0.426 - 0.183 = 0.243
   \]
   Now we estimate:
   \[
   0.4 - 0.2 = 0.2
   \]
   The missing value is \( 0.2 \).

So, the missing value in the estimation is **0.2**.

Would you like further details on this process or help with another part?

### 5 Related Questions:
1. How do you round decimal numbers correctly?
2. Why do we estimate numbers in mathematical problems?
3. What are some common uses of estimation in everyday life?
4. How would this estimation change if the numbers were different, say \( 0.526 \) and \( 0.283 \)?
5. What is the exact subtraction result of \( 0.426 - 0.183 \)?

**Tip**: Always check whether rounding up or down makes the most sense depending on the situation!

Work out the missing value in this estimation: 0.426 - 0.183 ≈ 0.4 - ____

Learn how to estimate and round decimal values in the subtraction problem 0.426 - 0.183. We break down the steps, including rounding numbers to 0.4 and 0.2, and solving for the missing value. Perfect for students in Grade 6-7.

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