Question : Directions: After interchanging the given two signs what will be the values of expression (I) and (II) respectively?
+ and –
I. 45 + 15 × 30 ÷ 10 – 25
II. 6 × 9 + 5 – 8 ÷ 4
Option 1: 25 and 51
Option 2: 27 and 53
Option 3: 53 and 27
Option 4: 51 and 25
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Correct Answer: 25 and 51
Solution :
Given:
+ and –
I. 45 + 15 × 30 ÷ 10 – 25
II. 6 × 9 + 5 – 8 ÷ 4
Replace the given signs in the equations one by one with the original signs in the given equations.
I. 45 + 15 × 30 ÷ 10 – 25
= 45 – 15 × 30 ÷ 10 + 25
= 45 – 15 × 3 + 25
= 25
II.6 × 9 + 5 – 8 ÷ 4
=6 × 9 – 5 + 8 ÷ 4
= 54 – 5 + 2
= 51
So, the answer after solving the equation I and II is 25 and 51. Hence, the first option is correct.
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