Question

independent practice
subtract. draw place - value blocks to show your work.
regroup if needed.
4.
\

$$\begin{array}{c@{}c@{}c} & \\text{tens} & \\text{ones} \\\\ & 6 & 3 \\\\ - & & 2 \\\\ \\cline{2 - 3} & & \\\\ \\end{array}$$

5.
\

$$\begin{array}{c@{}c@{}c} & \\text{tens} & \\text{ones} \\\\ & 9 & 1 \\\\ - & & 7 \\\\ \\cline{2 - 3} & & \\\\ \\end{array}$$

6.
\

$$\begin{array}{c@{}c@{}c} & \\text{tens} & \\text{ones} \\\\ & 6 & 6 \\\\ - & & 9 \\\\ \\cline{2 - 3} & & \\\\ \\end{array}$$

7.
\

$$\begin{array}{c@{}c@{}c} & \\text{tens} & \\text{ones} \\\\ & 5 & 2 \\\\ - & & 6 \\\\ \\cline{2 - 3} & & \\\\ \\end{array}$$

Explanation:

Let's solve each subtraction problem step by step:

Problem 4:

• Step 1: Subtract Ones place

Ones: \( 3 - 2 = 1 \)

• Step 2: Subtract Tens place

Tens: \( 6 - 0 = 6 \) (since there’s no tens digit in the subtrahend)
Result: \( 63 - 2 = 61 \)

Problem 5:

• Step 1: Regroup (Ones place is insufficient)

Regroup 1 ten (9 tens → 8 tens) into 10 ones (1 one → 11 ones).

• Step 2: Subtract Ones place

Ones: \( 11 - 7 = 4 \)

• Step 3: Subtract Tens place

Tens: \( 8 - 0 = 8 \) (no tens digit in subtrahend)
Result: \( 91 - 7 = 84 \)

Problem 6:

• Step 1: Regroup (Ones place is insufficient)

Regroup 1 ten (6 tens → 5 tens) into 10 ones (6 ones → 16 ones).

• Step 2: Subtract Ones place

Ones: \( 16 - 9 = 7 \)

• Step 3: Subtract Tens place

Tens: \( 5 - 0 = 5 \) (no tens digit in subtrahend)
Result: \( 66 - 9 = 57 \)

Problem 7:

• Step 1: Regroup (Ones place is insufficient)

Regroup 1 ten (5 tens → 4 tens) into 10 ones (2 ones → 12 ones).

• Step 2: Subtract Ones place

Ones: \( 12 - 6 = 6 \)

• Step 3: Subtract Tens place

Tens: \( 4 - 0 = 4 \) (no tens digit in subtrahend)
Result: \( 52 - 6 = 46 \)

Final Answers:

1. \( \boldsymbol{61} \)
2. \( \boldsymbol{84} \)
3. \( \boldsymbol{57} \)
4. \( \boldsymbol{46} \)

Answer:

Let's solve each subtraction problem step by step:

Problem 4:

• Step 1: Subtract Ones place

Ones: \( 3 - 2 = 1 \)

• Step 2: Subtract Tens place

Tens: \( 6 - 0 = 6 \) (since there’s no tens digit in the subtrahend)
Result: \( 63 - 2 = 61 \)

Problem 5:

• Step 1: Regroup (Ones place is insufficient)

Regroup 1 ten (9 tens → 8 tens) into 10 ones (1 one → 11 ones).

• Step 2: Subtract Ones place

Ones: \( 11 - 7 = 4 \)

• Step 3: Subtract Tens place

Tens: \( 8 - 0 = 8 \) (no tens digit in subtrahend)
Result: \( 91 - 7 = 84 \)

Problem 6:

• Step 1: Regroup (Ones place is insufficient)

Regroup 1 ten (6 tens → 5 tens) into 10 ones (6 ones → 16 ones).

• Step 2: Subtract Ones place

Ones: \( 16 - 9 = 7 \)

• Step 3: Subtract Tens place

Tens: \( 5 - 0 = 5 \) (no tens digit in subtrahend)
Result: \( 66 - 9 = 57 \)

Problem 7:

• Step 1: Regroup (Ones place is insufficient)

Regroup 1 ten (5 tens → 4 tens) into 10 ones (2 ones → 12 ones).

• Step 2: Subtract Ones place

Ones: \( 12 - 6 = 6 \)

• Step 3: Subtract Tens place

Tens: \( 4 - 0 = 4 \) (no tens digit in subtrahend)
Result: \( 52 - 6 = 46 \)

Final Answers:

1. \( \boldsymbol{61} \)
2. \( \boldsymbol{84} \)
3. \( \boldsymbol{57} \)
4. \( \boldsymbol{46} \)