Question

А)(-40 2/5:10,1+2,6):(-7/18); б)(-20 2/5:5,1+1,8):(-11/15);в)(3,7-4,2)²:(-1 1/4). СРОООООООООООООООООООООООООООООООООООЧНО УМАЛЯЮ ВАС ДАЮ 40

Answer 1

Пошаговое объяснение:

А)

1) -40. 2/5 : 10,1 = -202/5 : 10,1 = -40,4 : 10,1 = -4

2) -4 + 2,6 = -1,4

3) -1,4 : (-7/18) = -14/10 : (-7/18) = -14/10 * (-18/7) = -2/5 * (-9/1) = 18/5 = 3. 3/5 или 3,6

Б)

1) -20. 2/5 : 5,1 = -102/5 : 5,1 = -20,4 : 5,1 = -4

2) -4 + 1,8 = -2,2

3) -2,2 : (-11/15) = -22/10 : (-11/15) = -22/10 * (-15/11) = -2/2 * (-3/1) = 6/2 = 3

В)

1) (3,7 - 4,2)² = (-0,5)² = -0,5 * (-0,5) = 0,25

2) 0,25 : (-1. 1/4) = 0,25 : (-5/4) = 0,25 : (-1,25) = -0,2

Answer 2

А) Let's solve the expression step by step:

First, let's simplify the division part: (-40 2/5 : -7/18)

To divide by a fraction, we can multiply by its reciprocal: (-40 2/5) * (18/-7)

Next, let's convert the mixed number into an improper fraction: (-40 2/5) = -((40 * 5) + 2)/5 = -((200 + 2)/5) = -(202/5)

Substituting this into the expression: -(202/5) * (18/-7)

Multiply the numerators together and the denominators together: = (-202 * 18) / (5 * -7)

= -3636 / -35

The negatives cancel out: = 3636 / 35

Now, let's simplify the fraction: 3636/35 = 104 1/35

So the value of expression A is 104 1/35.

Б) Let's solve the expression step by step:

First, let's simplify the division part: (-20 2/5 : -11/15)

To divide by a fraction, we can multiply by its reciprocal: (-20 2/5) * (15/-11)

Next, let's convert the mixed number into an improper fraction: (-20 2/5) = -((20 * 5) + 2)/5 = -((100 + 2)/5) = -(102/5)

Substituting this into the expression: -(102/5) * (15/-11)

Multiply the numerators together and the denominators together: = (-102 * 15) / (5 * -11)

= -1530 / -55

The negatives cancel out: = 1530 / 55

Now, let's simplify the fraction: 1530/55 = 27 15/55

We can simplify the fraction further by dividing both the numerator and denominator by 5: 27 15/55 = 27 3/11

So the value of expression B is 27 3/11.

В) Let's solve the expression step by step:

First, let's calculate the subtraction part: (3.7 - 4.2) = -0.5

Next, let's square the result: (-0.5)^2 = (-0.5) * (-0.5) = 0.25

Now, let's simplify the division part: 0.25 : (-1 1/4)

To divide by a mixed number, we can convert it to an improper fraction: (-1 1/4) = -((1 * 4) + 1)/4 = -((4 + 1)/4) = -(5/4)

Substituting this into the expression: 0.25 : -(5/4)

To divide by a fraction, we can multiply by its reciprocal: 0.25 * (-4/5)

Multiply the numerators together and the denominators together: = (0.25 * -4) / 5

= -1 / 5

So the value of expression C is -1/5.

Please note that the values obtained from the calculations may not precisely match the numbers you provided in the question.