Instructions: For each given equation, identify the correct interchange (of signs or numbers) from the options that makes the equation true.
2 × 4 + 5 - 3 = 15
Show answer & explanation
Correct answer: D
Explanation
Given equation:
2×4+5−3=15
We need to find the correct interchange of signs or numbers from the given options to make the equation true.
Check Option 1 (Interchange 4 and 5)
Equation becomes:
2×5+4−3=10+4−3=11
Not equal to 15.
Check Option 2 (Interchange × and +)
Equation becomes:
2+4×5−3
Apply ‘BODMAS rule’,
2+(4×5) −3=2+20−3=19
Not equal to 15.
Check Option 3 (Interchange 5 and 3)
Equation becomes:
2×4+3−5=8+3−5=6
Not equal to 15.
Check Option 4 (Interchange 2 and 3)
Equation becomes:
3×4+5−2=12+5−2=15
This equals 15, so it is correct.
Hence, the correct answer is option (4).