Question

-4/9 +(-3 2/7)+ 4,9 вычислите

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

Ответ:737/630

Пошаговое объяснение:

1)Преобразуем десятичную дробь в правильную

-4/9 - 3 2/7+49/10

2)Преобразуем смешанную дробь в неправильную

-4/9-23/7+49/10=737/630

Answer 3

To evaluate the given expression, follow these steps:

Step 1: Add or subtract the numbers in the parentheses first. Step 2: Add or subtract the resulting number with the other numbers outside the parentheses.

Let's proceed with the calculations:

Step 1: -3 2/7 can be converted to an improper fraction: -3 2/7 = -23/7 Now, we can rewrite the expression as: -4/9 + (-23/7) + 4.9

Step 2: To add these fractions and decimals, find a common denominator for the fractions. The common denominator for 9 and 7 is 63.

Now, let's rewrite the expression with the common denominator:

(-4 * 7 + (-23) * 9 + 4.9 * 63) / 63

Step 3: Calculate the numerator:

(-4 * 7 + (-23) * 9 + 4.9 * 63) = (-28 - 207 + 308.7)

Step 4: Calculate the final result:

(-28 - 207 + 308.7) / 63 = 73.7 / 63 ≈ 1.16984127

The approximate value of the expression is 1.1698 (rounded to four decimal places).