Вопрос:

Resolve the following arithmetic expressions: (12 5/12 + 1 2/3 - 3 5/6 + 2 3/4) : (2 1/2 * 2/5 - 7/9) 48 3/5 : 6 3/4 * 5/12 - 2 5/6 + 1 75/94 * (1 1/2 * 1/3 - 13 : 26)

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Ответ:

The problem requires solving two complex arithmetic expressions involving mixed numbers, fractions, addition, subtraction, multiplication, and division.

Expression 1:

  • Part 1: (12 5/12 + 1 2/3 - 3 5/6 + 2 3/4)
  • Convert mixed numbers to improper fractions:
    • 12 5/12 = (12*12 + 5)/12 = 149/12
    • 1 2/3 = (1*3 + 2)/3 = 5/3
    • 3 5/6 = (3*6 + 5)/6 = 23/6
    • 2 3/4 = (2*4 + 3)/4 = 11/4
  • Find a common denominator for 12, 3, 6, and 4, which is 12.
  • 149/12 + (5/3)*(4/4) - (23/6)*(2/2) + (11/4)*(3/3)
  • 149/12 + 20/12 - 46/12 + 33/12
  • (149 + 20 - 46 + 33) / 12 = 156 / 12 = 13
  • Part 2: (2 1/2 * 2/5 - 7/9)
  • Convert mixed number to improper fraction:
    • 2 1/2 = (2*2 + 1)/2 = 5/2
  • (5/2) * (2/5) - 7/9
  • 10/10 - 7/9
  • 1 - 7/9 = 2/9
  • Divide Part 1 by Part 2:
  • 13 / (2/9) = 13 * (9/2) = 117/2
  • Expression 2:

    • 48 3/5 : 6 3/4 * 5/12 - 2 5/6 + 1 75/94 * (1 1/2 * 1/3 - 13 : 26)
    • Convert mixed numbers to improper fractions:
      • 48 3/5 = (48*5 + 3)/5 = 243/5
      • 6 3/4 = (6*4 + 3)/4 = 27/4
      • 2 5/6 = (2*6 + 5)/6 = 17/6
      • 1 75/94 = (1*94 + 75)/94 = 169/94
      • 1 1/2 = (1*2 + 1)/2 = 3/2
    • Apply order of operations (PEMDAS/BODMAS): Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).
    • Innermost Parentheses first: (1 1/2 * 1/3 - 13 : 26)
    • (3/2) * (1/3) - 13/26
    • 3/6 - 1/2
    • 1/2 - 1/2 = 0
  • Now substitute this back into the expression:
  • 48 3/5 : 6 3/4 * 5/12 - 2 5/6 + 1 75/94 * 0
  • Convert to improper fractions:
  • 243/5 : 27/4 * 5/12 - 17/6 + 169/94 * 0
  • Perform Division and Multiplication from left to right:
  • (243/5) * (4/27) * (5/12) - 17/6 + 0
  • (243*4*5) / (5*27*12) - 17/6
  • 4860 / 1620 - 17/6
  • 3 - 17/6
  • Find a common denominator (6):
  • (3*6)/6 - 17/6
  • 18/6 - 17/6 = 1/6
  • Final Answers:

    • Expression 1: 117/2
    • Expression 2: 1/6
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