Question

1)-1 целая 1 | 7 десятых * 1 целую 5|16 сотых 2)1 целая 1 | 8 десятых : (-3 целых 3 | 8 десятых )

Answer 1

-8\7*21\16=-3\2=-1 2\2
-9\8:8\27=-1\3

Answer 2

To add or subtract mixed numbers with different fractional parts, we need to convert them to a common denominator.

-1 целая 1 | 7 десятых = -1 - 7/10 = -17/10 1 целая 5 | 16 сотых = 1 + 5/100 + 16/100 = 1 + 21/100 = 1.21

The common denominator of 10 and 100 is 1000. So, we convert both mixed numbers to their equivalent fractions with a denominator of 1000.

-17/10 = -170/100 = -1700/1000 1.21 = 121/100 = 1210/1000

Now, we can add these two fractions:

-1700/1000 + 1210/1000 = -490/1000

Simplifying this fraction, we get:

-490/1000 = -49/100

Therefore, the answer is:

-1 целая 49 | 100

To divide mixed numbers, we need to convert them to improper fractions and then divide.

1 целая 1 | 8 десятых = 1 + 8/10 = 1.8 -3 целых 3 | 8 десятых = -3 - 8/10 = -3.8

Converting them to improper fractions:

1.8 = (110 + 8)/10 = 18/10 = 9/5 -3.8 = (-310 - 8)/10 = -38/10 = -19/5

Dividing by a fraction is the same as multiplying by its reciprocal. So, we need to divide 9/5 by -19/5, which is the same as multiplying by -5/19.

9/5 * (-5/19) = -45/95

Simplifying this fraction, we get:

-45/95 = -9/19

Therefore, the answer is:

-0 целых 9 | 19 десятых