Question

Решить примеры: 1) ( -24,3 ) : ( 4,5 - 4,5 * (-0,8)) : ( -0,25 ) 2) 9,57 * ( -0,4 + 6, 07 ) - 6,07 * ( 9,57 - 0,4 ) 3) -3,8 : ( 2 3/7 + 3/7 * ( -2,5 )) - 2 19/95

Answer 1

Ответ:

Пошаговое объяснение:

1) (-24,3)÷(4,5-4,5*(-0,8))÷(-0,25)=(-24,3)÷0,9÷(0,25)=(-27)÷(-0,25)=108

2)9,57*(-0,4+6,07)-6,07*(9,57-,4)=9,57*5,67-6,07*9,17=54,2619-55,6619= - 1,4

3)-3,8÷(2 3/7 +3/7*(-2,5))-2 19/95=-3,8÷(2 3/7 + 1 1/14) - 2 19/95 =

= - 3 4/5 ÷ 3 1/2 - 2 19/95 = - 38/35 - 2 19/95 = - 3 38/133

Answer 2

To solve these expressions, let's take them one by one:

1. $( -24.3 ) : ( 4.5 - 4.5 \times (-0.8) ) : ( -0.25 )$

Step 1: First, let's calculate the expression inside the first set of parentheses: $4.5 - 4.5 \times (-0.8) = 4.5 + 3.6 = 8.1$

Step 2: Now, divide -24.3 by 8.1: $-24.3 \div 8.1 = -3$

Step 3: Finally, divide -3 by -0.25: $-3 \div (-0.25) = 12$

So, the solution to the first expression is $12$.

2. $9.57 \times ( -0.4 + 6.07 ) - 6.07 \times ( 9.57 - 0.4 )$

Step 1: Inside the first set of parentheses: $-0.4 + 6.07 = 5.67$

Step 2: Inside the second set of parentheses: $9.57 - 0.4 = 9.17$

Step 3: Perform the multiplications and subtractions: $9.57 \times 5.67 - 6.07 \times 9.17 = 54.3009 - 55.5359$

Step 4: Subtract the two results: $54.3009 - 55.5359 = -1.235$

So, the solution to the second expression is $-1.235$.

3. $-3.8 : ( 2 \frac{3}{7} + \frac{3}{7} \times ( -2.5 )) - 2 \frac{19}{95}$

Step 1: Inside the second set of parentheses: $\frac{3}{7} \times (-2.5) = -\frac{7.5}{7} = -1.07142857143$ (approx)

Step 2: Inside the first set of parentheses: $2 \frac{3}{7} + \left(-\frac{7.5}{7}\right) = \frac{17}{7} - \frac{7.5}{7} = \frac{17 - 7.5}{7} = \frac{9.5}{7}$

Step 3: Divide -3.8 by $\frac{9.5}{7}$: $-3.8 \div \frac{9.5}{7} = -3.8 \times \frac{7}{9.5}$

Step 4: Simplify the division: $-3.8 \times \frac{7}{9.5} = -3.8 \times 0.73684210526$ (approx)

Step 5: Perform the multiplication: $-3.8 \times 0.73684210526 = -2.8$ (approx)

Step 6: Subtract $2 \frac{19}{95}$ from the result: $-2.8 - 2 \frac{19}{95} = -2.8 - \frac{199}{95}$

Step 7: Convert $-2.8$ to a fraction with a common denominator of 95: $-2.8 = -2 - \frac{8}{10} = -2 - \frac{40}{50} = -2 - \frac{40}{50} = -2 - \frac{8}{10} = -2 \frac{8}{10} = -2 \frac{4}{5} = -\frac{10}{5} - \frac{4}{5} = -\frac{14}{5}$

Step 8: Subtract $\frac{199}{95}$ from $-\frac{14}{5}$: $-\frac{14}{5} - \frac{199}{95} = -\frac{14}{5} - \frac{199}{95}$