Question

20-18.6 :(6 11/15-4 3/20) пример

Answer 1

20-18,6(6 11/15-4 3/20)=12,8

Answer 2

To solve this expression, we can follow the order of operations (PEMDAS) and simplify any fractions or mixed numbers as needed.

20 - 18.6 = 1.4

Next, let's simplify the expression in parentheses:

6 11/15 - 4 3/20

To subtract mixed numbers, we need to borrow from the whole number portion if necessary. So we have:

6 11/15 - 4 3/20 = 6 - 4 - 3/20 + 11/15 = 2 - 9/60 + 44/60 (convert the fractions to have a common denominator of 60) = 2 + 35/60 = 2 7/12

Now we can substitute these simplified values back into the original expression:

20 - 18.6 - (6 11/15 - 4 3/20) = 1.4 - 2 7/12 To subtract mixed numbers, we need to borrow from the whole number portion if necessary. So we have:

1 40/100 - 2 7/12 = 0.4 - 2.58333 = -2.18333 (rounded to five decimal places)

Therefore, 20-18.6:(6 11/15-4 3/20) = -2.18333 (rounded to five decimal places).