Problem Overview:
The image contains a series of addition and subtraction problems involving two-digit numbers. The tasks are organized into rows, with each row containing four problems. The instructions specify that calculations should begin with the
ones column and then move to the
tens column.
Solution Approach:
1.
Addition Problems:
- Start by adding the digits in the
ones column.
- If the sum is 10 or more, carry over the tens digit to the
tens column.
- Then add the digits in the
tens column, including any carry-over from the ones column.
2.
Subtraction Problems:
- Start by subtracting the digits in the
ones column.
- If the digit in the ones column of the minuend is smaller than the subtrahend, borrow 1 from the
tens column of the minuend.
- Then subtract the digits in the
tens column, adjusting for any borrowing.
Step-by-Step Solutions:
####
Row 1: Addition
1.
11 + 3
- Ones: \( 1 + 3 = 4 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
14
2.
12 + 1
- Ones: \( 2 + 1 = 3 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
13
3.
10 + 4
- Ones: \( 0 + 4 = 4 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
14
4.
11 + 2
- Ones: \( 1 + 2 = 3 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
13
####
Row 2: Addition
5.
12 + 2
- Ones: \( 2 + 2 = 4 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
14
6.
14 + 0
- Ones: \( 4 + 0 = 4 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
14
7.
10 + 2
- Ones: \( 0 + 2 = 2 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
12
8.
13 + 1
- Ones: \( 3 + 1 = 4 \)
- Tens: \( 1 + 0 = 1 \)
- Result:
14
####
Row 3: Subtraction
9.
14 - 3
- Ones: \( 4 - 3 = 1 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
11
10.
14 - 2
- Ones: \( 4 - 2 = 2 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
12
11.
14 - 4
- Ones: \( 4 - 4 = 0 \)
- Tens: \( 1 - 1 = 0 \)
- Result:
10
12.
14 - 3
- Ones: \( 4 - 3 = 1 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
11
####
Row 4: Subtraction
13.
14 - 1
- Ones: \( 4 - 1 = 3 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
13
14.
14 - 1
- Ones: \( 4 - 1 = 3 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
13
15.
14 - 2
- Ones: \( 4 - 2 = 2 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
12
16.
14 - 0
- Ones: \( 4 - 0 = 4 \)
- Tens: \( 1 - 0 = 1 \)
- Result:
14
Final Answers:
```
Row 1: 14, 13, 14, 13
Row 2: 14, 14, 12, 14
Row 3: 11, 12, 10, 11
Row 4: 13, 13, 12, 14
```
Boxed Final Answer:
\[
\boxed{14, 13, 14, 13, 14, 14, 12, 14, 11, 12, 10, 11, 13, 13, 12, 14}
\]
Parent Tip: Review the logic above to help your child master the concept of 1st grade math worksheet addition and subtraction.
