Question

-4,16:0,4-7/9*2 4/7=. 2,8*(-3)-5,6:(-4)=

Answer 1

Ответ:

Перший розрахунок:

4,16:0,4-7/9*2 = 10.4 - 1.56 ≈ 8.84

Отже, результат першого розрахунку дорівнює близько 8.84.

Другий розрахунок:

2,8*(-3)-5,6:(-4) = -8.4 - 1.4 = -9.8

Отже, результат другого розрахунку дорівнює -9.8.

Answer 2

Let's break down the two expressions step by step:

Expression 1: -4,16:0,4-7/9*2 4/7

Step 1: -4,16:0,4 -4 divided by 0 is undefined because you cannot divide by zero. So, this part of the expression is undefined.

Step 2: -7/9 * 2 4/7 First, let's calculate -7/9 * 2: -7/9 * 2 = (-7/9) * (2/1) = (-7 * 2) / (9 * 1) = -14/9

Now, multiply -14/9 by 4/7: (-14/9) * (4/7) = (-14 * 4) / (9 * 7) = -56/63

So, the result of this part of the expression is -56/63.

Now, let's put it all together:

-4,16:0,4 - 7/9 * 2 4/7 = Undefined - (-56/63)

Since you cannot subtract a fraction from an undefined value, the final result of this expression is undefined.

Expression 2: 2,8 * (-3) - 5,6:(-4)

Step 1: 2,8 * (-3) 2,8 * (-3) = 2 * (-3) + 8 * (-3) = -6 - 24 = -30

Step 2: 5,6:(-4) 5,6 divided by (-4) = (5/6) / (-4/1) = (5/6) * (-1/4) = -5/24

Now, let's put it all together:

2,8 * (-3) - 5,6:(-4) = -30 - (-5/24)

To subtract a negative fraction, you can change it to addition:

-30 + 5/24 = -720/24 + 5/24 = (-720 + 5) / 24 = -715/24

So, the result of this expression is -715/24.