Solve Vertical Subtraction: 308 minus 89 Step-by-Step

Video Solution

Solution Steps

00:00 Solve

00:03 Each time we consider borrowing 2 digits, and then we'll place

00:06 8 is less than 9

00:09 The tens digit is also equal to 0 so we can't borrow from it

00:14 We'll borrow hundred from the hundreds place for the tens

00:17 So now instead of 0 we'll have 10, in the tens place!

00:21 And now we'll borrow ten from the tens place for the ones

00:25 Which will change the tens from 10 to 9

00:29 So now instead of 8 we'll have 18, in the ones place!

00:34 Now we subtract ones from ones, and place in ones

00:37 Subtract tens from tens, and place in tens

00:43 Place 0 in the missing digits

00:46 Subtract hundreds from hundreds, and place in hundreds

00:48 And that's the solution to the problem

Step-by-Step Solution

To solve this subtraction problem, we must perform vertical subtraction of 89 from 308 using the borrowing technique:

Step 1: Write the numbers in vertical format, ensuring that each digit is in the correct place value column:

$\begin{array}{c} & 3 & 0 & 8 \\ - & & 8 & 9 \\ \hline \end{array}$

Step 2: Start with the rightmost column (units). We need to subtract 9 from 8, but since 8 is smaller than 9, borrow 1 from the tens column.

With borrowing, the tens digit (0) decreases to 9 after borrowing 1 from the hundreds column.
This gives us: 2 in the hundreds, 9 in the tens, and 18 in the units column.

Units: Subtract 9 from 18 to get 9.
Tens: Subtract 8 from 9 to get 1.
Hundreds: As there is no digit to subtract from 2 in the hundreds place, it remains 2.

$\begin{array}{c} & 2 & 9 & 18 \\ - & & 8 & 9 \\ \hline & 2 & 1 & 9 \\ \end{array}$

Therefore, the difference between 308 and 89 is $219$ .

The correct choice from the provided answer choices is choice 1: 219.