Problem Description:
The task involves solving
2-digit subtraction problems WITHOUT regrouping. This means that in each subtraction, the digit in the ones place of the minuend is greater than or equal to the digit in the ones place of the subtrahend, and the same applies to the tens place. No borrowing is required.
Solution Approach:
1.
Understand the Problem: Each subtraction problem involves two 2-digit numbers where no regrouping is needed.
2.
Perform Subtraction: Subtract the digits in the ones place first, then subtract the digits in the tens place.
3.
Verify: Ensure that no borrowing is required (i.e., the minuend's digits are always greater than or equal to the subtrahend's digits).
Step-by-Step Solution:
#### First Row:
1.
36 - 10:
- Ones place: \(6 - 0 = 6\)
- Tens place: \(3 - 1 = 2\)
- Result:
26
2.
66 - 16:
- Ones place: \(6 - 6 = 0\)
- Tens place: \(6 - 1 = 5\)
- Result:
50
3.
84 - 14:
- Ones place: \(4 - 4 = 0\)
- Tens place: \(8 - 1 = 7\)
- Result:
70
4.
47 - 33:
- Ones place: \(7 - 3 = 4\)
- Tens place: \(4 - 3 = 1\)
- Result:
14
#### Second Row:
5.
68 - 45:
- Ones place: \(8 - 5 = 3\)
- Tens place: \(6 - 4 = 2\)
- Result:
23
6.
39 - 15:
- Ones place: \(9 - 5 = 4\)
- Tens place: \(3 - 1 = 2\)
- Result:
24
7.
56 - 12:
- Ones place: \(6 - 2 = 4\)
- Tens place: \(5 - 1 = 4\)
- Result:
44
8.
41 - 20:
- Ones place: \(1 - 0 = 1\)
- Tens place: \(4 - 2 = 2\)
- Result:
21
#### Third Row:
9.
23 - 11:
- Ones place: \(3 - 1 = 2\)
- Tens place: \(2 - 1 = 1\)
- Result:
12
10.
81 - 71:
- Ones place: \(1 - 1 = 0\)
- Tens place: \(8 - 7 = 1\)
- Result:
10
11.
82 - 32:
- Ones place: \(2 - 2 = 0\)
- Tens place: \(8 - 3 = 5\)
- Result:
50
12.
75 - 51:
- Ones place: \(5 - 1 = 4\)
- Tens place: \(7 - 5 = 2\)
- Result:
24
#### Fourth Row:
13.
71 - 40:
- Ones place: \(1 - 0 = 1\)
- Tens place: \(7 - 4 = 3\)
- Result:
31
14.
45 - 14:
- Ones place: \(5 - 4 = 1\)
- Tens place: \(4 - 1 = 3\)
- Result:
31
15.
93 - 10:
- Ones place: \(3 - 0 = 3\)
- Tens place: \(9 - 1 = 8\)
- Result:
83
16.
83 - 43:
- Ones place: \(3 - 3 = 0\)
- Tens place: \(8 - 4 = 4\)
- Result:
40
Final Answer:
\[
\begin{array}{cccc}
26 & 50 & 70 & 14 \\
23 & 24 & 44 & 21 \\
12 & 10 & 50 & 24 \\
31 & 31 & 83 & 40 \\
\end{array}
\]
\boxed{
\begin{array}{cccc}
26 & 50 & 70 & 14 \\
23 & 24 & 44 & 21 \\
12 & 10 & 50 & 24 \\
31 & 31 & 83 & 40 \\
\end{array}
}
Parent Tip: Review the logic above to help your child master the concept of two digit subtraction without regrouping worksheet.
