Question

-3\4:5\6-2 1\2*2\5+1:1 1\9

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

Ответ:

-13/10

Пошаговое объяснение:

На фото

Ps:

Не очень акуратно написала, но разобрать можно

Answer 3

To solve the expression:

-3/4 : 5/6 - 2 1/2 * 2/5 + 1 : 1 1/9,

we can follow the order of operations (PEMDAS/BODMAS), which stands for Parentheses/Brackets, Exponents/Orders, Multiplication/Division, and Addition/Subtraction.

First, let's simplify the expression step by step:

1. Convert mixed numbers to improper fractions:

-3/4 : 5/6 - 5/2 * 2/5 + 1 : 10/9

2. Perform multiplication and division from left to right:

-3/4 : 5/6 - 5/2 * 2/5 + 1 : 10/9 = -3/4 : 5/6 - 10/10 + 1 : 10/9 = -3/4 : 5/6 - 1 + 1 : 10/9 = -3/4 : 5/6 - 1 + 9/10

3. Perform the division -3/4 : 5/6:

To divide fractions, we multiply the first fraction by the reciprocal of the second fraction:

-3/4 : 5/6 = -3/4 * 6/5 = -18/20 = -9/10

So now we have:

-9/10 - 1 + 9/10

4. Perform addition and subtraction from left to right:

-9/10 - 1 + 9/10 = -9/10 - 10/10 + 9/10 = (-9 - 10 + 9)/10 = -10/10 = -1

Therefore, the expression -3/4 : 5/6 - 2 1/2 * 2/5 + 1 : 1 1/9 equals -1.