To determine which of these examples is an error in addition by one, we need to check each sum and verify its correctness. Here are the calculations and evaluations for each option:
### Option A: [tex]\( 4572 + 5324 \)[/tex]
Given Equation: [tex]\( 4572 + 5324 = 9896 \)[/tex]
- Sum of numbers: 9896
- Provided answer: 9896
- Comparison: [tex]\( 9896 - 9896 = 0 \)[/tex]
Conclusion: This equation is correct.
### Option B: [tex]\( 2876 + 4123 \)[/tex]
Given Equation: [tex]\( 2876 + 4123 = 6999 \)[/tex]
- Sum of numbers: 6999
- Provided answer: 6999
- Comparison: [tex]\( 6999 - 6999 = 0 \)[/tex]
Conclusion: This equation is correct.
### Option C: [tex]\( 5621 + 2356 \)[/tex]
Given Equation: [tex]\( 5621 + 2356 = 7977 \)[/tex]
- Sum of numbers: 7977
- Provided answer: 7977
- Comparison: [tex]\( 7977 - 7977 = 0 \)[/tex]
Conclusion: This equation is correct.
### Option D: [tex]\( 6453 + 2345 \)[/tex]
Given Equation: [tex]\( 6453 + 2345 = 8698 \)[/tex]
- Sum of numbers: 8798
- Provided answer: 8698
- Comparison: [tex]\( 8798 - 8698 = 100 \)[/tex]
Conclusion: This equation is incorrect and the difference is 100, not one, so it’s not an error of addition by one.
Based on the evaluations above, none of the given examples is an error of addition by one. All of them were correctly evaluated as either true or false based on their respective sums and expected results.
