Problem Overview:
The task involves solving a series of three-digit subtraction problems and then checking the work by adding the differences back to verify the original numbers. This is a common method to ensure accuracy in arithmetic operations.
Steps to Solve:
1.
Subtract the given numbers to find the difference.
2.
Add the difference back to the smaller number to see if it equals the larger number.
3. Repeat this process for all the problems provided.
Solution:
#### First Row:
1.
Problem 1:
- Subtract: \( 24 - 5 = 19 \)
- Check: \( 19 + 5 = 24 \) (Correct)
2.
Problem 2:
- Subtract: \( 95 - 88 = 7 \)
- Check: \( 7 + 88 = 95 \) (Correct)
3.
Problem 3:
- Subtract: \( 513 - 423 = 90 \)
- Check: \( 90 + 423 = 513 \) (Correct)
#### Second Row:
1.
Problem 4:
- Subtract: \( 81 - 73 = 8 \)
- Check: \( 8 + 73 = 81 \) (Correct)
2.
Problem 5:
- Subtract: \( 91 - 34 = 57 \)
- Check: \( 57 + 34 = 91 \) (Correct)
3.
Problem 6:
- Subtract: \( 74 - 66 = 8 \)
- Check: \( 8 + 66 = 74 \) (Correct)
#### Third Row:
1.
Problem 7:
- Subtract: \( 968 - 920 = 48 \)
- Check: \( 48 + 920 = 968 \) (Correct)
2.
Problem 8:
- Subtract: \( 94 - 77 = 17 \)
- Check: \( 17 + 77 = 94 \) (Correct)
3.
Problem 9:
- Subtract: \( 93 - 56 = 37 \)
- Check: \( 37 + 56 = 93 \) (Correct)
#### Fourth Row:
1.
Problem 10:
- Subtract: \( 107 - 82 = 25 \)
- Check: \( 25 + 82 = 107 \) (Correct)
2.
Problem 11:
- Subtract: \( 711 - 618 = 93 \)
- Check: \( 93 + 618 = 711 \) (Correct)
3.
Problem 12:
- Subtract: \( 71 - 49 = 22 \)
- Check: \( 22 + 49 = 71 \) (Correct)
Final Answer:
All the subtraction problems have been solved correctly, and the checks confirm the solutions. The differences are as follows:
-
Row 1: \( 19, 7, 90 \)
-
Row 2: \( 8, 57, 8 \)
-
Row 3: \( 48, 17, 37 \)
-
Row 4: \( 25, 93, 22 \)
Thus, the final answer is:
\[
\boxed{19, 7, 90, 8, 57, 8, 48, 17, 37, 25, 93, 22}
\]
Parent Tip: Review the logic above to help your child master the concept of subtraction worksheet check with addition.
