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

To solve the problem of finding how many blocks remain after removing 19 from 48, we will perform the subtraction operation and handle regrouping if necessary:

Step 1: Start with the original number of blocks: $48$.

Step 2: We need to subtract 19 from this total. Let's write this subtraction vertically:

$\begin{array}{c} 48 \\ - 19 \\ \hline \end{array}$

Step 3: In the units column (rightmost column), we have 8 (from 48) and we need to subtract 9. Since 8 is smaller than 9, we regroup from the tens column. This leaves us with:

• Convert one 10 from the tens place in 48, leaving 3 tens, and add that 10 to the units column, making it 18.
• Now subtract 9 from 18 in the units column. This results in 9.

Step 4: Proceed to the tens column. We regrouped once, so we're left with 3 tens (from original 4 tens). Subtract 1 ten (from the 19) from 3 tens, leaving us with 2 tens.

Thus, the remaining amount after performing the subtraction is:

$\begin{array}{c} 3 & 8 \\ - 1 & 9 \\ \hline 2 & 9 \\ \end{array}$

Therefore, the number of blocks remaining is $\boxed{29}$.

We need to determine how many blocks are left after removing a certain number from a total.

First, let's identify the given figures:

• Initial number of blocks: $17$
• Number of blocks removed: $14$

The formula for finding out how many blocks remain is subtraction:

Remaining Blocks = Total Blocks - Blocks Removed

Substituting the given numbers into this formula:

Remaining Blocks = $17 - 14$

We perform the subtraction:

$17 - 14 = 3$

Therefore, after removing 14 blocks from the total of 17, we find that the number of blocks remaining is $\mathbf{3}$.

To solve this problem, let's follow a step-by-step approach using subtraction with regrouping:

• Step 1: Set up the subtraction problem as $46 - 27$.
• Step 2: Compare the one's place: 6 (in 46) and 7 (in 27). Since 6 is less than 7, we need to regroup.
• Step 3: Regroup one ten from the 4 tens in 46. This will leave us with 3 tens and increase the units to 16.
• Step 4: Now perform the subtraction for the one's place: $16 - 7 = 9$.
• Step 5: Subtract the tens: $3 - 2 = 1$.

Thus, the remaining number of blocks after removing 27 from 46 is $19$.

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

• Step 1: Identify the given numbers: Total blocks = 72, Blocks to remove = 45.
• Step 2: Subtract the number of blocks being removed from the total number of blocks.

Let's perform the subtraction step-by-step:

$72 - 45$

First, subtract the units digit: $2 - 5$.

Since 2 is smaller than 5, we need to borrow from the tens column:

• Borrow 1 ten from the 7 (in 72), making it 6.
• The units now become 12.

Now subtract the units digits: $12 - 5 = 7$.

Next, subtract the tens digits: $6 - 4 = 2$.

Combine the results to get the number remaining:

The number of blocks remaining after removing 45 from 72 is $27$.

This matches the correct choice among the provided answers, which is option 3: $27$.

Therefore, the solution to the problem is $27$.

Let's solve the subtraction problem to find out how many blocks remain:

Given:

• Total number of blocks = $53$
• Number of blocks removed = $38$

We need to perform the subtraction of $38$ from $53$:

Set up the subtraction column:

• $\begin{array}{c} \phantom{-} 5\phantom{8} \\ - \, 3\phantom{5} \\ \hline \end{array}$ Tens digit (5) minus 3 is 2.
• $\begin{array}{c} \phantom{2}3 \\ - \phantom{3}8 \\ \hline \end{array}$ Units column requires borrowing: change $5$ tens to $4$ tens and add 10 to units.
• $\begin{array}{c} \phantom{1}13 \\ - \phantom{1}8 \\ \hline \phantom{1}5 \end{array}$

Final calculation gives $15$.

Therefore, the number of blocks remaining is $15$.

First, we start with the total number of blocks, which is $34$.

We need to remove $16$ blocks from this total. Therefore, we perform the subtraction:

$34 - 16$.

Let's break this down:
$34$ is composed of $3$ tens (i.e., $30$) and $4$ ones.
Subtracting $16$ means subtracting $1$ ten and $6$ from these $34$ blocks.

First, subtract $10$ from $34$, which leaves us with $24$. Then, subtract $6$ from $24$, giving:

$24 - 6 = 18$.

Therefore, after removing $16$ blocks, we are left with $18$ blocks.

The solution to the problem is $18$.

To solve this problem, begin by employing the basic subtraction formula:

• Subtract the blocks removed (18) from the total number of blocks (27).
• Mathematically, this is written as: $27 - 18$.

Perform the subtraction:

$27 - 18 = 9$.

Therefore, the number of blocks remaining after removing 18 from 27 is $\boxed{9}$.