Question

2/ 5*3.2+12,915:2,87+6/10

Answer 1

сокращаем дробь - $\frac{2}{5}$ * $\frac{16}{5}$ + 4.5 + 0.6

умножаем дроби - $\frac{32}{25}$ + 4.5 + 0.6

преобразовываем обыкновенную дробь в десятичную - 1.28 + 4.5 + 0.6

вычисляем сумму - 6.38

Ответ:6,38

Answer 2

To solve this expression, you should follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders (i.e., powers and square roots, etc.), Multiplication and Division (left-to-right), and Addition and Subtraction (left-to-right). In this case, there are no parentheses or exponents, so we'll perform multiplication and division from left to right, followed by addition and subtraction from left to right:

1. 2/5 * 3.2 = 0.8 (division)
2. 0.8 + 12,915 = 12,915.8 (addition)
3. 12,915.8 / 2 = 6,457.9 (division)
4. 87 + 6 = 93 (addition)
5. 93 / 10 = 9.3 (division)

So, the final result is:

6,457.9 + 9.3 = 6,467.2