Question

2.5/14+3.8/14 ; 6-2.1/9​

Answer 1

объяснение:

При сложении и вычитании целую часть складывают (вычитают) с целой частью, дробь складывают (вычитают) с дробью.

Answer 2

Пошаговое объяснение:

2 5/14 + 3 8/14 = (2+3) + (5+8)/14 =

5 + 13/14 = 5 13/14

6 - 2 1/9 = 5 9/9 - 2 1/9 = (5-2) + (9-1)/9 =

3 + 8/9 = 3 8/9

Answer 3

To solve these arithmetic expressions, let's calculate each one step by step:

1. 2.5/14 + 3.8/14:

To add fractions, we need to have a common denominator. In this case, the common denominator is 14.

2.5/14 + 3.8/14 = (2.5 + 3.8) / 14 = 6.3 / 14

The fraction 6.3/14 cannot be simplified further. So the result is 6.3/14.

2. 6 - 2.1/9:

When subtracting fractions, we need a common denominator. In this case, the common denominator is 9.

6 - 2.1/9 = 6 - (2.1/9) = 6 - 0.233333...

To convert the decimal to a fraction, we can multiply both the numerator and denominator by 10 to get rid of the decimal:

6 - 0.233333... = 6 - (2.1/9) = 6 - (2.1 * 10) / (9 * 10) = 6 - 21/90

Simplifying the fraction:

6 - 21/90 = 6 - 7/30

To subtract fractions, we need a common denominator. In this case, the common denominator is 30.

6 - 7/30 = (6 * 30)/30 - 7/30 = 180/30 - 7/30 = 173/30

So the result is 173/30.