Question

2,6*3,5-18:(3 2/5+1 3/5)=

Answer 1

Ответ:

2,6*3,5-18:(3 2/5+1 3/5) = 2,6*3,5-18:5 = 9,1-18:5 = 9,1-3,6= 5,5

Answer 2

To solve this expression, you should follow the order of operations, which is often remembered using the acronym PEMDAS (Parentheses, Exponents, Multiplication and Division, Addition and Subtraction). Here's how you can calculate the expression step by step:

1. First, simplify the expressions inside the parentheses and fractions:

   • $3 \frac{2}{5} + 1 \frac{3}{5} = 3 \frac{2}{5} + \frac{5}{5} + \frac{3}{5} = 3 \frac{10}{5} + \frac{5}{5} + \frac{3}{5} = 6 + 1 + \frac{3}{5} = 7 \frac{3}{5}$.

2. Now, substitute this simplified value back into the original expression: $2.6 \times 3.5 - 18 \div (7 \frac{3}{5})$.

3. Perform the division inside the expression: $18 \div (7 \frac{3}{5}) = 18 \div \left(\frac{38}{5}\right)$.

   To divide by a fraction, you can multiply by its reciprocal: $18 \div \left(\frac{38}{5}\right) = 18 \times \frac{5}{38}$.

4. Now, calculate the product on the right side: $18 \times \frac{5}{38} = \frac{18 \times 5}{38} = \frac{90}{38}$.

5. Simplify the fraction by dividing both the numerator and denominator by their greatest common divisor (2 in this case): $\frac{90}{38} = \frac{45}{19}$.

6. Now, substitute this simplified value back into the original expression: $2.6 \times 3.5 - \frac{45}{19}$.

7. Finally, calculate the remaining multiplication and subtraction: $2.6 \times 3.5 - \frac{45}{19} \approx 9.1 - 2.3684 \approx 6.7316$.

So, the result is approximately 6.7316.