Question

-11 11/28+(-9 5/21)..

Answer 1

Ответ:

Всё просто.

Пошаговое объяснение:

-11 11/28+(-9 5/21)=-319/28+(-194/21)=-1 914/168+(-1552/168)=-3466/168=-1733/84 =-20 53/84

Ответ:-20 53/84

Answer 2

To add the two mixed numbers (-11 11/28) and (-9 5/21), you can follow these steps:

Step 1: Add the whole numbers: -11 + (-9) = -20

Step 2: Add the fractions separately: 11/28 + 5/21

To add fractions with different denominators, you first need to find a common denominator. In this case, the least common denominator (LCD) is the smallest multiple of 28 and 21, which is 84. So, you'll need to convert both fractions to have a denominator of 84:

For 11/28, you need to multiply both the numerator and denominator by 3 to get a denominator of 84: (11/28) * (3/3) = 33/84

For 5/21, you need to multiply both the numerator and denominator by 4 to get a denominator of 84: (5/21) * (4/4) = 20/84

Now that both fractions have a common denominator of 84, you can add them together:

33/84 + 20/84 = (33 + 20)/84 = 53/84

So, the result of adding (-11 11/28) and (-9 5/21) is:

-20 + 53/84

You can leave it as an improper fraction or convert it back to a mixed number if needed.