After interchanging the given two signs what will be the values of equation (I) and (II) respectively?
× and -
I. 7 × 8 - 6 + 15 ÷ 3
II. 8 - 9 × 2 + 45 ÷ 5
Show answer & explanation
Correct answer: C
Explanation
The correct answer is option 3 i.e. -36 and 79.
Given: × and -
I. 7 × 8 - 6 + 15 ÷ 3 (After interchanging the given two signs):
⇒ 7 - (8 × 6) + (15 ÷ 3)
⇒ 7 - 48 + 5
⇒ 12 - 48 = -36
II. 8 - 9 × 2 + 45 ÷ 5 (After interchanging the given two signs):
⇒ (8 × 9) - 2 + (45 ÷ 5)
⇒ 72 - 2 + 9
⇒ 81 - 2 = 79