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lf 'x' means '-', '-' means '+', '/' means 'x', and '+' means '÷', which of the following is correct?

A20 + 4-2 × 5 = 10

B15 - 3 + 6/2 = 12

C48 / 8 + 3-5 × 1 = 15

D10 × 2-4+8/2=9

Answer:

D. 10 × 2-4+8/2=9

Read Explanation:

Given:

  • × means −

  • − means +

  • / means ×

  • + means ÷

Substitute the symbols and evaluate each expression using the normal order of operations.

  1. 20 + 4 − 2 × 5 = 10
    → 20 ÷ 4 + 2 − 5
    = 5 + 2 − 5 = 2

  2. 15 − 3 + 6 / 2 = 12
    → 15 + 3 ÷ 6 × 2
    = 15 + (3 ÷ 6 × 2) = 15 + 1 = 16

  3. 48 / 8 + 3 − 5 × 1 = 15
    → 48 × 8 ÷ 3 + 5 − 1
    = 384 ÷ 3 + 5 − 1 = 128 + 5 − 1 = 132

  4. 10 × 2 − 4 + 8 / 2 = 9
    → 10 − 2 + 4 ÷ 8 × 2
    = 10 − 2 + (4 ÷ 8 × 2) = 8 + 1 = 9

Correct answer: Option 4.

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