Question

1) 1 2/7 : (-3/14) 2) 1 2/3 - 0,9

Answer 1

Ответ:

1)-12/7×14/3

-4×2

-8

2)4-0.9=3.1

Answer 2

Ответ:

всё на фото..............

Пошаговое объяснение:

вооооот

Answer 3

Let's solve the two mathematical expressions you provided:

1. 1 2/7 : (-3/14):

To divide a mixed number by a fraction, we first need to convert the mixed number into an improper fraction.

1 2/7 can be written as an improper fraction: 1 * 7 + 2 = 9/7

So, the expression becomes: 9/7 : (-3/14)

Dividing fractions involves multiplying by the reciprocal of the divisor, so we can rewrite the expression as multiplication:

9/7 * (-14/3)

To multiply fractions, we simply multiply the numerators together and the denominators together:

(9 * -14) / (7 * 3) = -126/21

The fraction -126/21 can be simplified by dividing both the numerator and denominator by their greatest common divisor, which is 21:

-126/21 = -6/1 = -6

Therefore, 1 2/7 : (-3/14) is equal to -6.

2. 1 2/3 - 0.9:

To subtract a decimal from a mixed number, we first convert the mixed number into a decimal.

1 2/3 can be written as a decimal: 1 + 2/3 = 3/3 + 2/3 = 5/3 = 1.6667 (rounded to four decimal places)

Now we can subtract 0.9 from 1.6667:

1.6667 - 0.9 = 0.7667

Therefore, 1 2/3 - 0.9 is approximately equal to 0.7667.