Question

3,5-3 1/2×5 1/5+1 1/2÷(-2,6)​

Answer 1

Ответ:

Пошаговое объяснение:

3 1/2×5 1/5=7\2*26\5=91\5=18.2

1 1\2:(-2.6)=3\2*(-5\13)=-15\26

3.5-18.2=-14.7

-14.7+(-15\26)=-14 7\10-15\26=-14 91\130-75\130=-15 18\65

Answer 2

To solve the expression you provided, let's break it down step by step:

1. Convert the mixed numbers to improper fractions:

   • 3 1/2 = (3 * 2 + 1) / 2 = 7/2
   • 5 1/5 = (5 * 5 + 1) / 5 = 26/5
   • 1 1/2 = (1 * 2 + 1) / 2 = 3/2

2. Perform multiplication and division before addition and subtraction:

   • 3.5 - 3 1/2 × 5 1/5 + 1 1/2 ÷ (-2.6)
   • = 3.5 - (7/2) × (26/5) + (3/2) ÷ (-2.6)

3. Multiply and divide:

   • = 3.5 - (7/2) * (26/5) + (3/2) / (-2.6)
   • = 3.5 - (7 * 26) / (2 * 5) + (3/2) / (-2.6)
   • = 3.5 - 182/10 + (3/2) / (-2.6)

4. Simplify the fractions:

   • = 3.5 - 91/5 + (3/2) / (-2.6)

5. Convert the mixed number to an improper fraction:

   • (3/2) / (-2.6) = (3 * 2) / (-2.6) = -6/2.6

6. Substitute the values back into the expression:

   • 3.5 - 91/5 - 6/2.6

7. Find a common denominator for the fractions:

   • The least common multiple of 5 and 2.6 is 13.

8. Convert the fractions to have the common denominator:

   • 3.5 = 17.5/5
   • 91/5 remains the same
   • -6/2.6 = -15/6.5

9. Substitute the fractions back into the expression with the common denominator:

   • 17.5/5 - 91/5 - 15/6.5

10. Combine the fractions with the same denominator:

• (17.5 - 91)/5 - 15/6.5

11. Perform subtraction:

• (-73.5)/5 - 15/6.5

12. Simplify the negative fraction:

• (-73.5)/5 = -14.7

13. Substitute the simplified fraction back into the expression:

• -14.7 - 15/6.5

14. Find a common denominator for the fractions:

• The least common multiple of 5 and 6.5 is 32.5.

15. Convert the fractions to have the common denominator:

• -14.7 = -14.7 * (6.5/6.5) = -95.55/6.5
• 15/6.5 remains the same

16. Substitute the fractions back into the expression with the common denominator:

• -95.55/6.5 - 15/6.5

17. Combine the fractions with the same denominator:

• (-95.55 - 15)/6.5

18. Perform subtraction:

• (-110.55)/6.5

19. Simplify the negative fraction:

• (-110.55)/6.5 = -17.01

Therefore, the expression 3.5 - 3 1/2 × 5 1/5 + 1 1/2 ÷ (-2.6) is equal to -17.01.