Question

1) -12,76+0,66+(-8,9)=2) -4/21+ 3/14= ПОМОГИТЕ СРООЧНО!!

Answer 1

1)-12,76+0,66+(-8,9)=

1)-12,76-8,9= -21,66

2) -21,66+0,66= -21

2) -4/21 + 3/14= -8/42 + 9/42 = 1/42

Answer 2

1. To solve this arithmetic expression, you simply need to add up the three numbers:

-12.76 + 0.66 + (-8.9) = -20

Therefore, the solution is -20.

2. To solve this expression involving fractions, you need to find a common denominator for the two fractions. In this case, the lowest common denominator is 42. You can then convert each fraction to an equivalent fraction with a denominator of 42:

-4/21 = -8/42 3/14 = 9/42

Now you can add the two fractions:

-8/42 + 9/42 = 1/42

Therefore, the solution is 1/42.