Addition: Simple addition

Let's solve this problem step by step.

Step 1: Identify the numbers to be added:
We have $55$ and $40$.

Step 2: Perform the addition:
- Align the numbers according to their place values:
    $55$
+ $40$
-----------
- Add the digits in the ones place: $5 + 0 = 5$
- Add the digits in the tens place: $5 + 4 = 9$
Thus, combining these, the sum is $95$.

Therefore, the solution to the problem $55 + 40$ is $95$.

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

• Step 1: Identify the numbers to add, which are $10$ and $34$.

• Step 2: Perform the addition of these numbers.

Now, let's work through these steps:

Step 1: We have the numbers $10$ and $34$ to be added.

Step 2: Align the numbers vertically as follows:

$\begin{array}{c} 10 \\ +34~~~ \\ \hline \end{array}$

Start adding from the rightmost digits:
$0 + 4 = 4$
In this case, there is no carry-over.
Now add the next column on the left:
$1 + 3 = 4$

Therefore, the final sum is $44$.

Step 3: Ensure that $44$ matches the provided answer choice. Indeed, option 4 corresponds to our calculation.

Therefore, the solution to the problem is $44$.

To solve the addition problem $22 + 36$, we will follow these steps:

• Step 1: Align the numbers vertically based on place value:

  22
+36
----

Step 2: Begin adding from the rightmost column, which is the units place:

Units: $2 + 6 = 8$. Write 8 under the line in the units place.

Step 3: Move to the tens column:

Tens: $2 + 3 = 5$. Write 5 under the line in the tens place.

At this point, we have summed the digits in each column and written the final result below the other numbers.

  22
+36
----
  58

Therefore, the sum of 22 and 36 is $\mathbf{58}$.

The correct answer is

$58$

.

Let's solve this problem using basic addition:

• Step 1: Write down the numbers 35 and 22 with the units and tens places aligned:

 35
+22
----

• Step 2: Start by adding the units place digits: $5 + 2 = 7$.
• Step 3: Add the tens place digits: $3 + 2 = 5$.

Combine the results to get the final sum:

 35
+22
----
 57

Therefore, the solution to the problem is $57$, which corresponds to choice 2.

To solve the addition problem $43 + 51$, we'll follow these steps:

• Step 1: Align the numbers vertically by their place value (units, tens).
• Step 2: Start adding from the rightmost column, which is the units column, and proceed to the leftmost column (tens).

Let's perform the addition:
Step 1: Align the numbers:
    43
+  51
------

Step 2: Add the units column: $3 + 1 = 4$. Write 4 in the units place.
Add the tens column: $4 + 5 = 9$. Write 9 in the tens place.

Thus, the sum of 43 and 51 is $94$.

The correct answer is $94$, which corresponds to choice 1.

To solve this problem, we will follow these steps:

• Step 1: Recognize that the unknown represented by the yellow box is given as 12.
• Step 2: Set up the addition equation using the information given: $23 + 12$.
• Step 3: Perform the addition.
• Step 4: Match the result with one of the provided choices.

Now, let's perform the calculations:
Step 1: Interpret $\text{yellow box} = 12$ as $12$.
Step 2: The expression we need to solve is $23 + 12$.
Step 3: Calculate the sum:
$23 + 12 = 35$.

We find that the sum of 23 and 12 is 35.

Therefore, the solution to the problem is $35$, which corresponds to choice number 2 in the given options.

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

• Step 1: Substitute the symbol with the given number $12$.
• Step 2: Add this number to $14$.

Now, let's work through each step:

Step 1: According to the problem, the symbol inside the yellow box equals $12$. This means wherever we see this symbol, we can replace it with $12$.
Step 2: We need to solve $12 + 14$. Let's perform this calculation:

$12 + 14 = 26$

Therefore, the correct solution to the problem is $26$.

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

• Step 1: Identify the value of the yellow box.
• Step 2: Perform the addition with the given value.
• Step 3: Verify the result is among the provided choices.

Now, let's work through each step:
Step 1: The problem states the yellow box is equal to $12$.
Step 2: Add $12$ to $50$:

$12 + 50 = 62$

Step 3: Look at the possible answer choices:

• Choice 1: $62$
• Choice 2: $52$
• Choice 3: $72$
• Choice 4: $54$

Therefore, the solution to the problem is $62$.

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

• Step 1: Recognize that the yellow shape represents the number 12.
• Step 2: Replace the shape in the equation with its numeric value.
• Step 3: Perform the addition.

Now, let's work through these steps:
Step 1: The problem states that the yellow shape is equivalent to $12$.
Step 2: We replace the yellow shape with $12$ in the addition equation.
Step 3: Solve the equation $12 + 30 = 42$. This addition gives us the solution.

Therefore, the solution to the problem is $42$.

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

• Step 1: Recognize the given equation $8 + \triangle = 68$.
• Step 2: To isolate $\triangle$, subtract 8 from both sides of the equation.

Now, let's work through each step:
Step 1: We initially have the equation $8 + \triangle = 68$.
Step 2: Subtract 8 from both sides to find $\triangle$:

$\triangle = 68 - 8$

This calculation gives us:

$\triangle = 60$

Therefore, the numerical value of the triangle is $60$.