Vertical Addition Practice Problems - Step by Step Solutions

To solve the given vertical addition problem, follow these steps:

• Step 1: Align the numbers by place value: 81 has a tens digit (8) and a ones digit (1). The number 8 is placed under the ones digit.
• Step 2: Start with the ones column: Add the digits $1 + 8$. The sum of 1 and 8 is 9.
• Step 3: Since the sum in the ones column is less than 10, there is no need to carry over a number to the tens column.
• Step 4: Move to the tens column: There is no additional number under the 8, so it remains as 8.
• Step 5: Combine these results to get the final sum: The tens digit is 8 and the ones digit is 9, resulting in the number 89.

Therefore, the solution to the problem is $89$.

To solve this addition problem, follow these steps:

• Step 1: Align the numbers vertically. We have the numbers $90$ and $9$.
• Step 2: Write them down with equal alignment such that their units digits are aligned:

$\begin{aligned} &90 \\ + &~9\\ \end{aligned}$

• Step 3: Begin by adding the rightmost column (units column): $0 + 9 = 9$. Write $9$ in the units place below the line.
• Step 4: Move to the left column (tens column). Add: $9 + 0 = 9$.
• Step 5: Write $9$ in the tens place below the line.

This gives us the complete sum:

$\begin{aligned} &90 \\ + &9 \\ \underline{~~~~} \\ &99 \\ \end{aligned}$

Therefore, the sum of $90$ and $9$ is $\textbf{99}$.

Referring to the multiple-choice answers provided, the correct choice is \textbf{choice 4: 99}.

To solve this problem, we'll add the numbers 24 and 4 using vertical addition:

• Step 1: Align the numbers vertically with the units and tens digits properly aligned:
$\begin{aligned} &24 \\ +& \\ &~~4 \\ \end{aligned}$

• Step 2: Add from the rightmost column (units position):
  The units digits are 4 and 4. Their sum is $4 + 4 = 8$.
• Step 3: Move to the next column (tens position):
  In this case, the tens digit of the first number is 2, and there is no tens digit in the number 4. Since there is no carry, we simply bring down the 2.

The sum of the numbers is 28, which is represented as:

$\begin{aligned} &28 \end{aligned}$

Therefore, the correct answer is 28, which corresponds to choice .

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

• Step 1: Align the numbers such that the units are directly under each other:

$\begin{array}{r} 72 \\ + 7 \\ \hline \end{array}$

• Step 2: Add the units column. The units are 2 and 7.

Calculation: $2 + 7 = 9$. The result for the units column is 9.

• Step 3: Add the tens column. The tens are 7 with no carry from the previous step.

Calculation: $7 + 0 = 7$. The result for the tens column remains 7.

• Step 4: Combine both results:

Therefore, the sum is $79$.

Hence, the final answer is $79$. The correct choice is option 3.

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

• Step 1: Align the numbers $44$ and $4$ such that digits of the same place value (units) are below one another.
• Step 2: Add the digits in the units column. This means summing $4$ and $4$ to get $8$.
• Step 3: Check for carry over, if any, and add digits in the next column (tens column). In this case, there's no carry over needed, so just add the digit $4$ from $44$ with the implied $0$ from $4$ (tens place) to get $4$.
• Step 4: Combine the results. The tens place gives $4$ and the units place gives $8$, forming the number $48$.

Now, let's work through each step:
Step 1: Vertical alignment:
$\begin{array}{c} 44 \\ + 04 \\ \hline \end{array}$
Step 2: Units column $4 + 4 = 8$ (no carry over).
Step 3: Tens column $4 + 0 = 4$.
Step 4: Combining the tens and units results: the number is $48$.

Therefore, the sum of $44$ and $4$ is $48$. The correct choice from the provided options is choice $3$.