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(5) 
(12+8)×2

(55) (12+8)×2 (12+8) \times 2

Full solution

Q. (55) (12+8)×2 (12+8) \times 2
  1. Perform Addition: First, we need to perform the addition inside the parentheses.\newlineCalculate 12+812 + 8.\newline12+8=2012 + 8 = 20
  2. Calculate Result: Now, we need to multiply the result from Step 11 by 22. Calculate 20×220 \times 2. 20×2=4020 \times 2 = 40