Addition: Shapes instead of numbers

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 the problem, we will determine the value of $\triangle$ in the equation $5 + \triangle = 10$.

Here are the steps:

• Step 1: Write down the original equation:

$5 + \triangle = 10$

• Step 2: Isolate $\triangle$ by subtracting $5$ from both sides of the equation:

$\triangle = 10 - 5$

• Step 3: Calculate the result:

$\triangle = 5$

Thus, the numerical value of the triangle symbol is $5$.

Therefore, the solution to the problem is $5$.

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 $60$.

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

• Step 1: Identify the equation given as $\triangle + 79 = 89$.
• Step 2: Solve for the unknown variable $\triangle$.

Now, let's work through each step:
Step 1: Observe that the equation is structured as an addition problem with an unknown symbol $\triangle$.
Step 2: To isolate $\triangle$, perform the subtraction $89 - 79$ on the right side of the equation:

$\triangle = 89 - 79$

Perform the subtraction:

$89 - 79 = 10$

Thus, the numerical value of the triangle ($\triangle$) is $10$.

To solve the equation $6 + \triangle = 26$, we seek the value of $\triangle$. We can easily obtain this by isolating $\triangle$ on one side of the equation.

We employ the subtraction method to isolate $\triangle$:

• Subtract 6 from both sides of the equation:

Perform the calculation:

$\triangle = 20$

Thus, the numerical value of the triangle is $20$.

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

• Step 1: Identify the number represented by the symbol $\circ$.
• Step 2: Substitute the symbol $\circ$ with the number 7.
• Step 3: Perform the addition of 7 and 21.

Now, let's work through each step:
Step 1: Identify $\circ = 7$ from the problem statement.
Step 2: Substitute the value 7 for $\circ$ in $\circ + 21$, so we have $7 + 21$.
Step 3: Add 7 and 21 to get 28.

Therefore, the solution to the problem is $28$.

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

• Step 1: Identify the known numbers in the equation.
• Step 2: Rearrange the equation to solve for the unknown value.
• Step 3: Calculate using basic subtraction.

Now, let's work through each step:
Step 1: The known numbers in the equation are $30$ and $38$. We need to find $\triangle$ in $30 + \triangle = 38$.
Step 2: Rearrange the equation to isolate $\triangle$: $\triangle = 38 - 30$.
Step 3: Calculate the difference: $\triangle = 8$.

Therefore, the value of the triangle is $8$.

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

• Step 1: Identify the given information
• Step 2: Substitute the value of $\circ$ and perform addition

Now, let's work through each step:
Step 1: The problem states that $\circ = 7$.
Step 2: Substitute the value into the equation $60 + \circ$ to get $60 + 7$.
Perform the addition: $60 + 7 = 67$.

Therefore, the solution to the problem is $67$.

Let's solve the problem step-by-step:

• Step 1: Identify the substitution needed.
  We are given that $\circ = 7$. Thus, we need to solve $42 + \circ$ by substituting $\circ$ with 7.

• Step 2: Substitute the value into the addition problem.
  The expression becomes $42 + 7$.

• Step 3: Perform the addition.
  To find $42 + 7$, add the two numbers: $42 + 7 = 49$

Thus, the solution to the problem is $49$.

Correct Answer Choice: $49$

To solve this problem, we need to find the value represented by the triangle symbol in the equation $\triangle + 25 = 30$. This involves a straightforward algebraic process.

First, we want to isolate the triangle by removing the 25 that is added to it. To do this, we will subtract 25 from both sides of the equation:

• $\triangle + 25 = 30$
• Subtract 25 from both sides: $\triangle + 25 - 25 = 30 - 25$

Simplifying both sides, we have:

• $\triangle = 30 - 25$
• $\triangle = 5$

Therefore, the value of the triangle is $5$.

Let's solve the problem step by step:

• Step 1: Start with the equation provided: $45 + \triangle = 50$.

• Step 2: To solve for $\triangle$, isolate it by subtracting 45 from both sides of the equation to maintain equality.

• This subtraction gives: $\triangle = 50 - 45$.

• Step 3: Perform the subtraction on the right-hand side: $50 - 45 = 5$.

Thus, the numerical value of the triangle ($\triangle$) is $5$.

To determine the value of the triangle, we begin with the equation given:

$\triangle + 7 = 10$

We want to isolate $\triangle$. To do so, we subtract 7 from both sides of the equation:

$\triangle + 7 - 7 = 10 - 7$

This simplifies to:

$\triangle = 3$

Thus, the value of the triangle is $3$.

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

• Step 1: Set up the equation.
• Step 2: Isolate the triangle symbol using subtraction.
• Step 3: Calculate the numerical value of the triangle.

Now, let's work through each step:

Step 1: Set up the equation:

We start with the equation $8 + \triangle = 30$.

Step 2: Isolate the triangle symbol:

To find $\triangle$, we subtract $8$ from both sides of the equation:

$\triangle = 30 - 8$

Step 3: Calculate the numerical value of the triangle:

Performing the subtraction gives us:

$\triangle = 22$

Therefore, the solution to the problem is $\triangle = 22$.

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

• Recognize the format of the provided equation.
• Apply the appropriate arithmetic operation to isolate $\triangle$.
• Perform the necessary calculations.

Now, let's work through each step:
Step 1: The given equation is $78 + \triangle = 80$. We are tasked with finding the value of $\triangle$.
Step 2: To find $\triangle$, rearrange the equation to solve for $\triangle$:
$\triangle = 80 - 78$.
Step 3: Subtract the known value from the total to isolate $\triangle$:
$\triangle = 80 - 78 = 2$.

Hence, the solution to the problem is $\triangle = 2$.

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

• Step 1: Identify the given information

• Step 2: Rearrange the equation to solve for $\triangle$

• Step 3: Perform the subtraction to find $\triangle$

Now, let's work through each step:
Step 1: The problem gives us the equation $8 + \triangle = 40$. We need to find the value of $\triangle$.
Step 2: To isolate $\triangle$, we subtract 8 from both sides of the equation: $\triangle = 40 - 8$.
Step 3: Perform the subtraction, $40 - 8 = 32$.

Therefore, the solution to the problem is $\triangle = 32$.

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

• Step 1: Rewrite the given equation by subtracting 79 from both sides.
• Step 2: Simplify the result to isolate and determine the value of the triangle $(\triangle)$.

Now, let's work through each step:
Step 1: We start with the equation $\triangle + 79 = 80$. To isolate $\triangle$, subtract 79 from both sides:
$\triangle + 79 - 79 = 80 - 79$.

Step 2: Simplify the result:
$\triangle = 1$.

Therefore, the numerical value of the triangle is $\triangle = 1$. This corresponds with choice 3.

To determine the value of the triangle, we will solve the equation $41 + \triangle = 50$.

Let's solve it step by step:

• Step 1: Start with the equation: $41 + \triangle = 50$.
• Step 2: To isolate $\triangle$, subtract 41 from both sides:
• Step 3: $41 + \triangle - 41 = 50 - 41$.
• Step 4: This simplifies to $\triangle = 9$.

Therefore, the solution to the problem is $\triangle = 9$.