Question

(7/4-2/5) ×2/9хэлп ​

Answer 1

Ответ:

$( \frac{7}{4} - \frac{2}{5} ) \times \frac{2}{9} = \frac{27}{20} \times \frac{2}{9} = \frac{3}{10} = 0.3$

Answer 2

Ответ:

3/10

Пошаговое объяснение:

35/20-8/20=27/20

27/20*2/9=3/10

Answer 3

To solve the expression (7/4 - 2/5) × 2/9, we can follow the order of operations, which is parentheses, multiplication/division (from left to right), and addition/subtraction (from left to right).

Step 1: Simplify the expression inside the parentheses: (7/4 - 2/5) × 2/9

To subtract fractions, we need to find a common denominator. The common denominator of 4 and 5 is 20.

(7/4) × (5/5) - (2/5) × (4/4) = (35/20) - (8/20) = (35 - 8)/20 = 27/20

So, the expression simplifies to: 27/20 × 2/9

Step 2: Multiply the fractions: (27/20) × (2/9)

To multiply fractions, we simply multiply the numerators and multiply the denominators:

(27 × 2) / (20 × 9) = 54/180

Step 3: Simplify the fraction: 54/180 can be simplified by finding the greatest common divisor (GCD) of the numerator and the denominator, which is 18.

Dividing both the numerator and denominator by 18: 54/180 = (54 ÷ 18) / (180 ÷ 18) = 3/10

So, the simplified expression is 3/10.