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Questions and Answers
What is the sum of $7 + 876$?
If you add 7 and 876, what will the last digit of the result be?
Which of the following represents an incorrect calculation of the sum $7 + 876$?
What is the correct equation that sums to 883?
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If $x = 876$, what is the value of $7 + x$?
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Study Notes
Basic Addition Concepts
- The sum of the integers 7 and 876 is calculated as follows: 7 + 876 = 883.
- In the addition operation, focus on both the process and result for clarity and understanding.
Last Digit in Addition
- To determine the last digit of the result when adding 7 and 876, only the last digits of each number need to be added: 7 (last digit) + 6 (last digit of 876) = 13.
- The last digit of 13 is 3, so the last digit of 883 is 3.
Common Errors in Addition
- It's crucial to identify incorrect calculations when summing 7 and 876; any sum other than 883 demonstrates an arithmetic mistake.
- Verifying calculations can help pinpoint errors effectively.
Alternative Representations of the Sum
- A correct equation that represents summing to 883 can be written in various forms, such as:
- 878 + 5 = 883
- 900 - 17 = 883
Variable Scenario
- When substituting x = 876 into the expression 7 + x, the value becomes: 7 + 876 = 883, confirming the initial calculation is correct.
- Understanding variable substitution in equations can reinforce the concept of summation.
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Description
Test your skills in basic addition with this quiz that includes questions on the sum of 7 and 876. Determine the last digit of the result, identify incorrect calculations, and find the value of expressions involving these numbers. Perfect for reinforcing your foundational math skills.
