Examples with solutions for Vertical Subtraction: Subtraction of 3-digit and 2-digit numbers with regrouping

Exercise #1

amp;132amp;amp;  35amp;776amp; \begin{aligned} &132 \\ -& \\ &~~35 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Align the numbers by their place values. The number 132 is written above 35, ensuring the units, tens, and hundreds columns are properly placed.
  • Step 2: Start from the rightmost column, which is the units column:
    • Subtract the units digit: 252 - 5 requires borrowing since 2 is smaller than 5. Borrowing from the tens column converts 2 into 12.
    • After borrowing, subtract: 125=712 - 5 = 7.
  • Step 3: Move to the tens column:
    • After borrowing one "ten" to the units place, the tens column in the minuend is now 21=12 - 1 = 1 (since the tens digit went from 3 to 2 after borrowing).
    • Subtract: 23=12 - 3 = -1, recognizing the necessity to borrow from the hundreds.
    • Borrow 1 hundred, adding it to the tens to make: 123=912 - 3 = 9.
  • Step 4: Finally, subtract the hundreds column:
    • With borrowing adjustment: 000 - 0 remains unchanged because we lent one hundred to the tens place.
    • This happens because we effectively do 11=01 - 1 = 0 after resolving borrowing in tens and units.

Therefore, after performing all borrowing and subtractions,

The solution to 13235132 - 35 is 9797.

Answer

97

Exercise #2

amp;274amp;amp;  86amp;776amp; \begin{aligned} &274 \\ -& \\ &~~86 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this subtraction problem, we will follow these steps:

  • Step 1: Line up the numbers vertically to align the digits by place value.

  • Step 2: Start from the units column, note 464 - 6 requires borrowing from the tens place.

    • Since 4 is smaller than 6, we borrow 1 from the next higher place value. The tens digit (7) becomes 6, and the units digit becomes 1414.

  • Step 3: Subtract in the units column: 146=814 - 6 = 8.

  • Step 4: Move to the tens column, subtract 686 - 8. Since we borrowed from the hundreds place, it simplifies to 168=816 - 8 = 8.

  • Step 5: The hundreds digit in the minuend is 22, reduced by 1 due to previous borrowing, makes the effective hundreds 11.

  • Step 6: Finally, in the hundreds column, subtract 10=11 - 0 = 1.

Let's summarize the steps calculations as follows:

274amp; 86amp;2188 \begin{aligned} 274& \\ - \ 86& \\ \overline{\phantom{2}188} \\ \end{aligned}

Upon completion, the final result is 188188.

Answer

188

Exercise #3

amp;358amp;amp;  79amp;776amp; \begin{aligned} &358 \\ -& \\ &~~79 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this subtraction problem, we'll perform vertical subtraction with regrouping as necessary:

  • Step 1: Align the numbers vertically, ensuring that digits are in the correct place value columns.
  • Step 2: Begin with the units column: Subtract 9 from 8. Since 8 is smaller than 9, we need to regroup by borrowing from the tens column.
    • We take 1 ten from 5 in the tens column. The tens digit becomes 4, and we add 10 to 8 in the units column, making it 18.
    • Now, subtract 9 from 18, which equals 9.
  • Step 3: Move to the tens column: Subtract 7 from 4 (after borrowing). Since 4 is smaller than 7, we need to regroup again.
    • We borrow 1 hundred from the hundreds column; 3 becomes 2. The tens digit becomes 14.
    • Now, subtract 7 from 14, which equals 7.
  • Step 4: Finally, handle the hundreds column: Subtract 0 from 2 (after borrowing), resulting in 2.

Therefore, the solution to the subtraction is 279279.

Answer

279

Exercise #4

amp;481amp;amp;  83amp;776amp; \begin{aligned} &481 \\ -& \\ &~~83 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we'll perform vertical subtraction with regrouping of the numbers 481 and 83.

Follow these steps:

  • Step 1: Write the numbers vertically, aligning the digits by place value:

481  83   77633 \begin{array}{c} 481 \\ - ~~83~~~ \\ \underline{\phantom{77633}} \end{array}

  • Step 2: Begin with the units column (rightmost column). The digit in the minuend (1) is less than the digit in the subtrahend (3). Therefore, we need to regroup.

    • Regrouping involves borrowing 1 from the tens column of the minuend, changing 8 in 481 to 7 and increasing the units digit by 10, changing 1 to 11.

  • Step 3: Subtract the units column: 113=811 - 3 = 8.

  • Step 4: Move to the tens column. Since we borrowed 1, the tens digit in 481 is now 7. Subtract 8 from 7, borrowing again from the hundreds digit:

    • Regroup by borrowing 1 from the hundreds column, changing 4 to 3 and increasing the tens digit by 10, changing 7 to 17.

  • Step 5: Subtract the tens column: 178=917 - 8 = 9.

  • Step 6: The hundreds column remains to be calculated: 30=33 - 0 = 3 (since there’s nothing to subtract except the result of our previous borrow).

This process results in:

481  83   776444398 \begin{array}{c} 481 \\ - ~~83~~~ \\ \underline{\phantom{776444}} \\ 398 \end{array}

Therefore, the solution to this problem is 398 398 , which corresponds to choice four.

Answer

398

Exercise #5

amp;572amp;amp;  94amp;776amp; \begin{aligned} &572 \\ -& \\ &~~94 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

Let's solve the problem using vertical subtraction. We have:

57294 \begin{array}{c} & 5 & 7 & 2 \\ - & & 9 & 4 \\ \hline \end{array}

Step 1: Subtract the rightmost digits (units):

We have 242 - 4, which is not possible without borrowing. So, we need to regroup:

  • Borrow 1 from the tens place (7 becomes 6), making the 2 a 12.

Now calculate:

124=812 - 4 = 8

Step 2: Subtract the tens digits:

We are left with 696 - 9, which again requires us to regroup:

  • Borrow 1 from the hundreds place (5 becomes 4), making the 6 a 16.

Now calculate:

169=716 - 9 = 7

Step 3: Finally, subtract the hundreds digits:

We now have 404 - 0, since there is no digit above in the subtrahend:

40=44 - 0 = 4

Putting it all together, the subtraction yields:

15721941478 \begin{array}{c} & \phantom{1} 5 & 7 & 2 \\ - & \phantom{1} & 9 & 4 \\ \hline & \phantom{1} 4 & 7 & 8 \\ \end{array}

Therefore, the answer to the problem is 478\textbf{478}.

Answer

478

Exercise #6

amp;667amp;amp;  89amp;776amp; \begin{aligned} &667 \\ -& \\ &~~89 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve 66789667 - 89, we perform vertical subtraction by aligning the numbers by place value:

  • Step 1: Start with the units column. Subtract 99 from 77. Since 7<97 < 9, we need to borrow from the tens column. Change 66 in the tens column to 55 and add 1010 to the units column, making it 1717. Now, subtract: 179=817 - 9 = 8.
  • Step 2: Move to the tens column, where we borrowed from 66, changing it to 55. Now subtract 88 from 55. Since 5<85 < 8, we need to borrow from the hundreds column. Change 66 in the hundreds column to 55 and add 1010 to the tens column, making it 1515. Now, subtract: 158=715 - 8 = 7.
  • Step 3: Finally, in the hundreds column: Subtract 00 from 55, leaving 55.

Therefore, the solution to 66789667 - 89 is 578\mathbf{578}.

Given the multiple-choice options, the correct choice is option 2: 578578.

Answer

578

Exercise #7

amp;713amp;amp;  58amp;776amp; \begin{aligned} &amp;713 \\ -&amp; \\ &amp;~~58 \\ &amp;\underline{\phantom{776}} &amp; \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow these steps:

  • Step 1: Write the numbers in column form.

  • Step 2: Subtract starting from the rightmost (units) column.

  • Step 3: Apply borrowing/regrouping if necessary.

Now, let's work through each step:

Step 1: Write the numbers vertically.
713058   776 \begin{array}{c} 713\\ -\phantom{0}58~~~ \\ \underline{\phantom{776}} \\ \end{array}

Step 2: Starting with the units column:
Since 3 < 8 , we need to borrow 1 from the tens column (1 becomes 0, and 3 becomes 13).

Step 3: Perform the subtraction with borrowing:
- Units: 138=513 - 8 = 5
- Tens: Re-evaluated 0 (after borrowing) minus 5, need another borrow so 0 turns to 10. - After borrowing from hundreds column, 105=510 - 5 = 5.
- Hundreds: After borrowing, left with 6. Thus, 60=66 - 0 = 6

Therefore, put all together, the difference is:
713058   655 \begin{array}{c} 713\\ -\phantom{0}58~~~ \\ \underline{655} \\ \end{array}

Therefore, the solution to the problem is 655 655 .

Answer

655

Exercise #8

amp;827amp;amp;  68amp;776amp; \begin{aligned} &amp;827 \\ -&amp; \\ &amp;~~68 \\ &amp;\underline{\phantom{776}} &amp; \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve the problem of subtracting 68 from 827, we will perform vertical subtraction with regrouping (borrowing) where necessary.

First, let's write the numbers vertically aligned by place value:

amp;827amp;068amp;776 \begin{aligned} &amp;827 \\ -&amp;\phantom{0}68 \\ &amp;\underline{\phantom{776}} \\ \end{aligned}

Next, we'll perform subtraction starting from the rightmost digit (units place):

  • The units column: 7 (from 827) minus 8. Since 7 is less than 8, we need to borrow 1 from the tens column. After borrowing, the 7 becomes 17.

  • 17 minus 8 equals 9. Write 9 directly under this column.

Now, move to the tens column:

  • Since we borrowed 1, the 2 (from 827) is now 1. Subtract 6 (from 68) from 11 (the borrowed number).
    11 minus 6 equals 5. Write 5 directly under this column.

Finally, the hundreds column:

  • Since no numbers exist below the hundreds place in 68 and we only borrowed from the tens place, we subtract nothing from 8. So, 8 stays the same.

  • Write 8 directly under this column.

Putting it all together, the complete difference is:

amp;827amp;068amp;759 \begin{aligned} &amp;827 \\ -&amp;\phantom{0}68 \\ &amp;\overline{759} \\ \end{aligned}

Therefore, the solution to the problem is 759 759 .

Answer

759

Exercise #9

amp;945amp;amp;  67amp;776amp; \begin{aligned} &amp;945 \\ -&amp; \\ &amp;~~67 \\ &amp;\underline{\phantom{776}} &amp; \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem using vertical subtraction, follow these steps:

  • Step 1: Align the Numbers
    Write the numbers with their digits aligned by place value:
    94567776\begin{array}{c} 945 \\ - 67 \\ \underline{\phantom{776}} \end{array}
  • Step 2: Subtract the Units Place
    In the units place, we have 575 - 7. Since 5 is smaller than 7, we need to borrow from the tens place.
    Borrowing from the tens, the 4 becomes 3, and the 5 becomes 15.
    So, 157=815 - 7 = 8.
  • Step 3: Subtract the Tens Place
    Now, subtract the tens place: 363 - 6. Since 3 is smaller than 6, borrow from the hundreds place.
    The 9 becomes 8, and the 3 becomes 13 after borrowing.
    So, 136=713 - 6 = 7.
  • Step 4: Subtract the Hundreds Place
    Finally, subtract the hundreds place: 80=88 - 0 = 8, as there is no number in the hundreds place of 67.

Therefore, after performing the subtraction, we find that the result is 878878.

Answer

878

Exercise #10

amp;968amp;amp;  89amp;776amp; \begin{aligned} &amp;968 \\ -&amp; \\ &amp;~~89 \\ &amp;\underline{\phantom{776}} &amp; \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve the problem 96889968 - 89 using vertical subtraction, follow these steps:

  • Align the numbers vertically by place value:

 amp;9amp;6amp;8amp; amp;8amp;9 \begin{array}{c} ~ &amp; 9 &amp; 6 &amp; 8 \\ - &amp; ~ &amp; 8 &amp; 9 \\ \hline \end{array}

  • Subtract the rightmost column (units):
    Since 898 - 9 is not possible directly, we borrow 1 from the tens column.

  • After borrowing, the units column becomes 189=918 - 9 = 9.

 amp;9amp;6 5amp;18amp; amp;8  amp;9 amp; amp; amp;9 \begin{array}{c} ~ &amp; 9 &amp; \cancel{\textcolor{red}{6}}~{5} \to &amp; 18 \\ - &amp; ~ &amp; 8~~ &amp; 9 \\ \hline ~ &amp; ~ &amp; ~ &amp; 9 \\ \end{array}

  • Subtract the tens column:
    After borrowing, the tens column becomes 585 - 8 not possible, so borrow 1 from the hundreds column.

  • After borrowing, the tens column becomes 158=715 - 8 = 7.

 amp;9 8amp;15amp;8amp; amp;8amp;9 amp; amp;7 \begin{array}{c} ~ &amp; \cancel{\textcolor{red}{9}}~ 8\to &amp;{15} &amp; 8 \\ - &amp; ~ &amp; 8 &amp; 9 \\ \hline ~ &amp; ~ &amp; 7 \\ \end{array}

  • Subtract the hundreds column:
    Now simply 80=88 - 0 = 8 since there is nothing to subtract.

 amp;8amp; amp; amp; amp; amp; amp;8amp;7amp;9 \begin{array}{c} ~ &amp; 8 &amp; ~ &amp; ~ \\ - &amp; ~ &amp; ~ &amp; ~ \\ \hline &amp;8 &amp; 7 &amp; 9 \\ \end{array}

Therefore, the solution to the problem is 879 879 .

Answer

879