Which two signs and two numbers should be interchanged in the equation given below to make the following equation correct?
20-2×10+5=68
Show answer & explanation
Correct answer: C
Explanation
From option (c)
change the signs + and −, and interchange the 5 and 2.
change the numbers:
20 − 5 × 10 + 2
change the signs:
20 + 5 × 10 − 2
= 20 + 50 − 2
= 68