What should be added to 63.47 to get 91 ?

Answer

To find out what should be added to 63.47 to get 91, we can follow these steps:

### Step 1: Set up the equation
Let the number that needs to be added be represented as \( x \). Therefore, we can write the equation as:
\[ 63.47 + x = 91 \]

### Step 2: Isolate \( x \)
To find \( x \), we need to isolate it on one side of the equation. We can do this by subtracting 63.47 from both sides:
\[ x = 91 - 63.47 \]

### Step 3: Perform the subtraction
Now, we will perform the subtraction:
1. Align the numbers:
```
91.00
- 63.47
```

2. Subtract starting from the rightmost digit:
- In the hundredths place: \( 0 - 7 \) (we need to borrow)
- Borrow 1 from the tenths place making it 9 (which becomes 10 in the hundredths), so \( 10 - 7 = 3 \).
- In the tenths place: \( 9 - 4 = 5 \).
- In the units place: \( 1 - 3 \) (we need to borrow again)
- Borrow 1 from the tens place making it 8 (which becomes 11 in the units), so \( 11 - 3 = 8 \).
- In the tens place: \( 8 - 6 = 2 \).

So, the subtraction gives us:
```
91.00
- 63.47
---------
27.53
```

### Step 4: Conclusion
Thus, the value of \( x \) is:
\[ x = 27.53 \]

This means that **27.53 should be added to 63.47 to get 91**.

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