Subtraction: 2-digit and 1-digit numbers -regrouping of tens

To solve this problem, we'll perform a direct replacement and subtraction. Here are the steps:

• Step 1: Replace $\circ$ with its given value. We know that $\circ = 8$, so we substitute to get $57 - 8$.
• Step 2: Perform the subtraction operation. We need to compute $57 - 8$.

Starting from the rightmost digit of the two numbers involved, we need to subtract 8 from 57:

• First, look at the units digit: Since 7 is greater than 8, let's subtract directly: $7 - 8$ cannot be done directly as we need to regroup.
• We regroup by borrowing 1 ten from the tens place in 57. This turns the 5 in the tens place into a 4, and the 7 in the units place into 17.
• Now subtract the single digits: $17 - 8 = 9$.
• Finally, subtract the tens digits: $4 - 0 = 4$.

As a result, $57 - 8 = 49$.

This solution corresponds to choice 1: $49$.

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

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

• Step 1: Identify the number represented by the yellow box.
• Step 2: Perform the subtraction operation.
• Step 3: Determine the resulting value.

Now, let's work through each step:
Step 1: The problem gives us that the yellow box equals 9.
Step 2: Perform the subtraction operation $68 - 9$.
Step 3: Calculating the subtraction, we have $68 - 9 = 59$.

Therefore, the solution to the problem is $59$.

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

• Step 1: Substitute the given value for $\circ$ into the subtraction problem.
• Step 2: Perform the subtraction.

Now, let's work through each step:

Step 1: We know that $\circ = 8$. Substitute this value into the expression:

$34 - \circ$ becomes $34 - 8$.

Step 2: Perform the subtraction:

$34 - 8 = 26$.

Therefore, the solution to the problem is $\boxed{26}$.

To solve this problem, we will follow these steps:

• Step 1: Substitute the value of $\circ$ with $8$.
• Step 2: Perform the subtraction.

Now, let's work through each step:

Step 1: The problem tells us that $\circ = 8$.

Step 2: Substitute $8$ into the equation where $\circ$ appears: $24 - 8$.

Step 3: Calculate the result of the subtraction:
Start from 24 and count backward by 8 units:

• Subtracting 4 from 24 gives us 20.
• Then, subtracting another 4 from 20 results in 16.

Therefore, the solution to the problem is $16$.

To solve this problem, we'll perform a straightforward subtraction operation:

• Step 1: Set up the subtraction operation using the given numbers:
  $62 - 7$.
• Step 2: Subtract 7 from 62:
  62 minus 7 equals 55.

Therefore, the solution to the problem is $55$.

Given the choices, the correct answer is choice $2$, which is $55$.

To solve this subtraction problem, we'll proceed with the following steps:

• Step 1: Recognize that the yellow box is equal to $7$.
• Step 2: Replace the yellow box in $81 - \text{{yellow box}}$ with $7$.
• Step 3: Perform the subtraction $81 - 7$.

Let's work through these steps:

Step 1: From the given information, the yellow box is $7$.

Step 2: Substitute the yellow box with $7$ in the expression.

The expression becomes $81 - 7$.

Step 3: Calculate $81 - 7$. We perform the subtraction:

• Subtract $7$ from $81$:
• $81 - 7 = 74$

The result is $74$.

Therefore, the solution to the problem is $74$.

To solve this problem, we'll use the substitution method for the subtraction equation provided:

• Step 1: Identify the value represented by the symbol. We are given that the yellow box equals 7.
• Step 2: Substitute the value 7 into the subtraction problem: $82 - 7$.
• Step 3: Perform the subtraction operation: $82 - 7 = 75$

Therefore, the solution to the problem is $75$.

To solve this problem, we'll proceed with straightforward subtraction:

• Step 1: Recognize that the yellow box equals 7.
• Step 2: Set up the subtraction: $41 - 7$.
• Step 3: Perform the subtraction calculation.

Now, let's calculate this step-by-step:
Starting with the minuend 41, subtract the subtrahend 7.
Calculation: $41 - 7 = 34$.

Therefore, the solution to the subtraction problem is $34$.