Examples with solutions for Vertical Addition: Addition of 3-digit and 2-digit numbers with regrouping within 1000

Exercise #1

amp;569+amp;amp;431amp;776amp; \begin{aligned} &569 \\ +& \\ &431 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this problem, let's use vertical addition as follows:

  • Step 1: Align the numbers by their place values:
                569 569
             + 431 431

  • Step 2: Start with the units column:
          Add 9+1=10 9 + 1 = 10 . Write 0 in the units place and carry over 1 to the tens column.

  • Step 3: Move to the tens column:
          Add 6+3=9 6 + 3 = 9 , then include the carried 1, making it 9+1=10 9 + 1 = 10 . Write 0 in the tens place and carry over 1 to the hundreds column.

  • Step 4: Finally, the hundreds column:
          Add 5+4=9 5 + 4 = 9 , then add the carried 1, making it 9+1=10 9 + 1 = 10 . Write 0 in the hundreds place and put 1 in the next column (thousands, a new place in this context).

The sum of the numbers is, thereby:
                      1000 1000

Therefore, the total is 1000 1000 .

Answer

900

Exercise #2

amp;742+amp;amp;258amp;776amp; \begin{aligned} &742 \\ +& \\ &258 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

To solve this vertical addition problem, let's break down each step:

  • Step 1: Align the numbers for vertical addition:
        742
    +  258
       

  • Step 2: Add the units column (rightmost digits):
        2 + 8 = 10, write down 00 and carry over 11 to the tens column.

  • Step 3: Add the tens column, including the carry:
        4 + 5 + 1 (carry) = 10, write down 00 and carry over 11 to the hundreds column.

  • Step 4: Add the hundreds column, including the carry:
        7 + 2 + 1 (carry) = 10, write down 00 and carry over 11 to the thousands position.

  • Since there is a carry in the thousands position, write down 11 as the leading digit.

Therefore, the sum of 742742 and 258258 is 10001000.

Answer

1000

Exercise #3

amp;685+amp;amp;315amp;776amp; \begin{aligned} &685 \\ +& \\ &315 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

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

  • Step 1: Add the units column
  • Step 2: Add the tens column, including any carry from the units
  • Step 3: Add the hundreds column, including any carry from the tens

Now, let's work through each step:

Step 1: Add the units column.

The units are 55 (from 685685) and 55 (from 315315).
5+5=105 + 5 = 10. Write 00 in the units place and carry over 11 to the tens place.

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

The tens are 88 (from 685685) and 11 (from 315315), plus the 11 carried over.
8+1+1=108 + 1 + 1 = 10. Write 00 in the tens place and carry over 11 to the hundreds place.

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

The hundreds are 66 (from 685685) and 33 (from 315315), plus the 11 carried over.
6+3+1=106 + 3 + 1 = 10. Write 00 in the hundreds place and 11 in the thousands place.

Therefore, the solution to the problem is 10001000.

Answer

1000

Exercise #4

amp;543+amp;amp;457amp;776amp; \begin{aligned} &543\\ +& \\ &457 \\ &\underline{\phantom{776}} & \\ \end{aligned}

Video Solution

Step-by-Step Solution

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

  • Add the digits in the units place (rightmost).
  • Add the digits in the tens place, including any carry from the units place.
  • Add the digits in the hundreds place, including any carry from the tens place.

Let's work through the addition step-by-step:

Step 1: Add the Units Place
The units digits are 3 and 7. Adding these gives 3+7=10 3 + 7 = 10 .
Write 0 in the units place of the answer and carry over the 1 to the tens column.

Step 2: Add the Tens Place
The tens digits are 4 and 5, plus the carryover 1. Adding these gives 4+5+1=10 4 + 5 + 1 = 10 .
Write 0 in the tens place of the answer and carry over the 1 to the hundreds column.

Step 3: Add the Hundreds Place
The hundreds digits are 5 and 4, plus the carryover 1. Adding these gives 5+4+1=10 5 + 4 + 1 = 10 .
This gives us 10 in the hundreds and thousands places.

Therefore, the solution to the problem is 1000 1000 .

Answer

1000

Exercise #5

amp;822+amp;amp;178amp;776amp; \begin{aligned} &822 \\ +& \\ &178 \\ &\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 vertically by their place values.
    The numbers are given as:

822+178 \begin{aligned} &822 \\ + &178 \\ \end{aligned}

  • Step 2: Add the digits from right to left, starting with the units place.

Units place addition:
2+8=102 + 8 = 10

We place 00 in the units place and carry over 11 to the tens place.

  • Step 3: Add the digits in the tens place, including the carry-over.

2+7=92 + 7 = 9, plus the carried over 11:
9+1=109 + 1 = 10

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

  • Step 4: Add the digits in the hundreds place, including the carry-over.

8+1=98 + 1 = 9, plus the carried over 11:
9+1=109 + 1 = 10

Place 00 in the hundreds place and carry over 11 to the next place, creating a new thousands place digit.

Resulting sum:

1000 \begin{aligned} &1000 \end{aligned}

Therefore, the solution to the problem is 10001000.

Answer

1000