Question

Вычислите 2) -0,2+1/6+(8 1/15); 3) -5,9+(-3 1/4+1 3/20); 4) 6,7+(2 1/3-9 2/5).

Answer 1

Ответ:

Пошаговое объяснение:

Answer 2

-0,2 + 1/6 + 8 1/15

= -0,2 + 0,166666... + 8 1/15 (convert 1/6 to decimal using long division)

= -0,2 + 0,166666... + 8 + 1/15 (convert mixed number to improper fraction)

= 7,966666... + 1/15

= 7 1/150

Therefore, -0,2 + 1/6 + 8 1/15 = 7 1/150.

-5,9 + (-3 1/4 + 1 3/20)

= -5,9 + (-3 5/20 + 1 3/20) (convert mixed numbers to improper fractions)

= -5,9 - 2 2/20 + 1 3/20

= -5,9 - 2/10 + 1/20

= -5,9 - 0,2 + 0,05

= -6,05

Therefore, -5,9 + (-3 1/4 + 1 3/20) = -6,05.

6,7 + (2 1/3 - 9 2/5)

= 6,7 + (2 5/15 - 9 4/15) (convert mixed numbers to improper fractions)

= 6,7 - 7 11/15

= -1 4/15

Therefore, 6,7 + (2 1/3 - 9 2/5) = -1 4/15.