Question

Two signs in the equations have been interchanged, find out the two signs to make the equation correct. \[ 3 \, - \, 5 \, + \, 8 \, + \, 2 \, - \, 10 = 13 \]

• A. \( + \) and \( - \)
• B. \( \times \) and \( \div \)
• C. \( = \) and \( - \)
• D. \( + \) and \( \div \)

Hint:

When solving sign-interchange problems, carefully check each sign and test by substituting it into the equation.

Answer 1

The Correct Option is D

Step 1: Analyze the equation.
Substitute the signs \( + \) and \( \div \) into the equation to make it correct.
Step 2: Conclusion.
After interchanging the signs, the equation becomes correct when \( + \) and \( \div \) are interchanged. Final Answer: \[ \boxed{+ \text{ and } \div} \]