Question

A) 12 + 7,8. (8,1 - 8,4); 6) -6 - 4,5. (5,2 - 10,6);B) 18,2 : (-9,1) 0,7 - 3,4.(-2,3): 17;T) -16,4 : (-8,2).(-0,6) + 5,2. 3,8: (-19). В столбики​

Answer 1

1)8.4
-
8.1
=0.3
Ответ:-0.3
2)12.0
+. 7.8
=19.8
Ответ:19.8
3)19.8•(-0.3)=
198
3
= -5.94

Answer 2

Let's break down the given expressions and calculate them step by step:

A)

1. 12 + 7.8 * (8.1 - 8.4)

First, calculate the expression inside the parentheses: 8.1 - 8.4 = -0.3

Now, multiply 7.8 by -0.3: 7.8 * (-0.3) = -2.34

Finally, add 12 to the result: 12 + (-2.34) = 9.66

A) = 9.66

B) 2. 18.2 / (-9.1) - 0.7 - 3.4 * (-2.3) / 17

First, divide 18.2 by -9.1: 18.2 / (-9.1) = -2

Now, calculate the expression inside the second pair of parentheses: -2.3 * 17 = -39.1

Now, divide -39.1 by 17: -39.1 / 17 ≈ -2.3 (rounded to one decimal place)

Now, calculate the expression step by step: -2 - 0.7 - (-2.3) = -2 - 0.7 + 2.3 = -0.4

B) = -0.4

T) 3. -16.4 / (-8.2) * (-0.6) + 5.2 * 3.8 / (-19)

First, divide -16.4 by -8.2: -16.4 / (-8.2) = 2

Now, multiply 2 by -0.6: 2 * (-0.6) = -1.2

Now, multiply 5.2 by 3.8: 5.2 * 3.8 = 19.76

Finally, divide 19.76 by -19: 19.76 / (-19) ≈ -1.041 (rounded to three decimal places)

T) = -1.041

So, the values for A), B), and T) are as follows: A) = 9.66 B) = -0.4 T) = -1.041

I'm not sure what you mean by "В столбики," but these are the numerical values for the given expressions.