Question

Fill in the blanks!
Using Only Digits to Subtract with Regrouping
Subtract: 131 - 12

Write the numbers vertically.
Line these numbers up by _.
Regroup a ten to make more ones.
Our answer is _.

Answer 1

To solve the subtraction problem \( 131 - 12 \) using regrouping, we can follow these steps:

1. Write the numbers vertically, aligned by place value:
```
131
- 12
```

2. Line these numbers up by **place value**, where the digits are aligned by units, tens, and hundreds.

3. Since we are subtracting 2 from 1 in the ones column and cannot do that without regrouping, we will regroup a ten from the tens place of 131 (which is 3) to make ones:

- Change the 3 in the tens place to a 2 (as we take 1 ten away).
- Add 10 to the 1 in the ones place, making it 11.

Now the numbers look like this:
```
120 (the new value of 131 after regrouping)
+ 11 (the new value in the ones place after regrouping)
- 12
```

Now we can subtract:

**In the ones place:**
- \( 11 - 2 = 9\)

**In the tens place:**
- \( 2 - 1 = 1\)

**In the hundreds place:**
- \( 1 - 0 = 1\)

Putting it all together, the answer is:
```
131
- 12
______
119
```

Our answer is **119**.