Examples with solutions for Vertical Addition: Addition of 3-digit numbers with the regrouping of numbers in excess of ten

Exercise #1

amp;772+amp;amp;135amp;776amp; \begin{aligned} &772 \\ +& \\ &135 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we'll use a step-by-step vertical addition approach:

Step 1: Add the units place digits.

The units digit of 772772 is 22, and that of 135135 is 55. Adding these gives:

2+5=72 + 5 = 7

Step 2: Add the tens place digits, including any carry from the units place.

The tens digit of 772772 is 77, and that of 135135 is 33. Since there is no carry from the units place, we simply add the two digits:

7+3=107 + 3 = 10

We write down 00 in the tens place and carry over 11 to the hundreds place.

Step 3: Add the hundreds place digits, including any carry from the tens place.

The hundreds digit of 772772 is 77, and that of 135135 is 11. Including the carry of 11, we perform the addition:

7+1+1=97 + 1 + 1 = 9

Therefore, there is no additional carry to move forward.

Bringing all parts together, we form the resulting number. Hence, the sum is:

907907

Answer

907

Exercise #2

amp;383+amp;amp;308amp;776amp; \begin{aligned} &383 \\ +& \\ &308 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we will perform vertical addition, a common technique for summing numbers.

Let's add the numbers 383 and 308 step-by-step:

  • Step 1: Add the units (rightmost) column:
    The units digits are 3 and 8.
    3+8=11 3 + 8 = 11 .
    Since this sum is greater than 9, we write down 1 in the units place and carry over 1 to the next column (tens place).
  • Step 2: Add the tens column, including the carry:
    The tens digits are 8 and 0, plus the 1 carried over.
    8+0+1=9 8 + 0 + 1 = 9 .
    Write 9 in the tens place.
  • Step 3: Add the hundreds column:
    The hundreds digits are 3 and 3.
    3+3=6 3 + 3 = 6 .
    Write 6 in the hundreds place.

Putting it all together, the sum of 383 and 308 is 691 691 .

Therefore, the correct answer to the problem is 691 691 .

Answer

691

Exercise #3

amp;664+amp;amp;227amp;776amp; \begin{aligned} &664 \\ +& \\ &227 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem using vertical addition, we follow these steps:

  • Step 1: Add the digits in the ones column:
    The ones digits are 4+7=114 + 7 = 11. We write down the 1 and carry over the other 1 to the tens column.
  • Step 2: Add the digits in the tens column, including the carry:
    The tens digits are 6+2=86 + 2 = 8, plus the carry of 11 makes 99. We write down the 9.
  • Step 3: Add the digits in the hundreds column:
    The hundreds digits are 6+2=86 + 2 = 8. No carry from the previous column this time. We write down the 8.

Therefore, combining these, the final result of adding 664 and 227 is 891891.

The correct choice from the multiple-choice options is 891891.

Answer

891

Exercise #4

amp;791+amp;amp;145amp;776amp; \begin{aligned} &791 \\ +& \\ &145 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

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

  • Step 1: Properly align the two numbers 791 and 145 vertically by their place values.

  • Step 2: Add the digits column by column, starting from the rightmost column (units position).

  • Step 3: Apply carrying over when the sum of any column exceeds 9.

Now, let's work through each step:

Step 1: Arrange the numbers:

amp;7amp;9amp;1+amp;1amp;4amp;5 \begin{array}{c} & 7 & 9 & 1 \\ + & 1 & 4 & 5 \\ \hline \end{array}

Notice the digits are aligned correctly according to their place value.

Step 2: Start adding from the rightmost column:

  • Units column: 1+5=61 + 5 = 6. Write 6 in the units place.

  • Tens column: 9+4=139 + 4 = 13. Write 3 in the tens place and carry over 1 to the hundreds place.

  • Hundreds column: 7+1=87 + 1 = 8, plus the carry over 1 gives 8+1=98 + 1 = 9. Write 9 in the hundreds place.

Step 3: The final result is:

amp;amp;9amp;3amp;6 \begin{array}{c} & & 9 & 3 & 6 \\ \end{array}

Therefore, the sum of 791 and 145 is 936\textbf{936}.

Answer

936

Exercise #5

amp;494+amp;amp;273amp;776amp; \begin{aligned} &494 \\ +& \\ &273 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we'll follow the process of vertical addition:

  • Step 1: Add the Ones Place: Add the digits in the ones place (4 + 3).
    Result: 7; no carrying is required.
  • Step 2: Add the Tens Place: Add the digits in the tens place (9 + 7).
    Result: 16; write down 6 and carry over the 1.
  • Step 3: Add the Hundreds Place: Add the digits in the hundreds place along with the carry (4 + 2 + 1).
    Result: 7; no additional carrying is required.

Combining these results, the final sum is 767 767 .

The correct multiple-choice answer is Choice 2: 767.

Answer

767

Exercise #6

amp;855+amp;amp;117amp;776amp; \begin{aligned} &855 \\ +& \\ &117 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, we'll use vertical addition, a method of adding numbers by aligning them by their rightmost digits (unit place) and dealing with carrying as necessary:

  • Step 1: Align the numbers by place value:
        +855 \phantom{+}855 \\ + +117 \phantom{+}117
  • Step 2: Add the digits in the unit's place:
    The digits in the unit's place are 55 and 77. Adding them gives 1212. Write down 22 in the unit column and carry over 11 to the tens column.
  • Step 3: Add the digits in the ten's place:
    The digits in the ten's place are 55 and 11, plus the carried over 11, giving us 77. Write 77 in the tens column.
  • Step 4: Add the digits in the hundred's place:
    The digits in the hundred's place are 88 and 11. Adding them gives 99.

Summing these gives us the total:
    +855 \phantom{+}855 \\ + +117 \phantom{+}117 \\   \underline{\phantom{.}972} \)

Thus, the answer is 972 972 .

Answer

972