Question

(2 3/4 -4 4/5) :7/5+ 13/28

Answer 1

Ответ:

-1

Пошаговое объяснение:

(2 3/4 -4 4/5) :7/5+ 13/28

Сначала скобки:

2 и 3/4 - 4 и 4/5 = 2 и 15/20 - 4 и 16/20 = -2 и 1/20

-2 и 1/20 : 7/5 = -41/20 * 5/7 = -41/28 = -1 и 13/28

-1 и 13/28 + 13/28 = -1

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Answer 2

Ответ:

Решение полностью на фото))))

Answer 3

To solve this expression, we'll break it down step by step, following the order of operations (PEMDAS/BODMAS - Parentheses/Brackets, Exponents/Orders, Multiplication and Division, Addition and Subtraction):

Step 1: Simplify the fractions within the parentheses:

2 3/4 = 11/4 (when converted to an improper fraction) 4 4/5 = 24/5 (when converted to an improper fraction)

So, the expression becomes:

(11/4 - 24/5) : 7/5 + 13/28

Step 2: Find a common denominator for the fractions within the parentheses. The common denominator for 4 and 5 is 20, so we'll rewrite the fractions with this common denominator:

(55/20 - 96/20) : 7/5 + 13/28

Step 3: Perform the subtraction within the parentheses:

(55/20 - 96/20) = (-41/20)

So, the expression becomes:

(-41/20) : 7/5 + 13/28

Step 4: To divide by a fraction (7/5), you multiply by its reciprocal (5/7):

((-41/20) * (5/7)) + 13/28

Step 5: Simplify the multiplication:

(-205/140) + 13/28

Step 6: Find a common denominator for the fractions:

The common denominator for 140 and 28 is 140. Rewrite the fractions with this common denominator:

((-205/140) * (1/1)) + (13/28 * (5/5))

Step 7: Perform the addition:

(-205/140) + (65/140)

Step 8: Add the fractions:

(-205/140 + 65/140) = (-140/140)

Step 9: Simplify the result:

(-140/140) = -1

So, the final answer is -1.