Question

A) (-8 + 10- 7): (-5);б) (-49) 8 (-7). 4;B)(-90- 40 - 20): 15.​

Answer 1

Ответ:

а)(-8 + 10- 7): (-5)=-5:(-5)=1 [минус на минус дает плюс)

б)не все условие

В)(-90- 40 - 20): 15=-150:15=-10

Пошаговое объяснение:

Answer 2

Ответ:

Пошаговое объяснение:

a) (-8 + 10 - 7): (-5)= (-15 +10):(-5)= -5 :(-5)= 1

б) (-49) 8 (-7) 4= -392*(-28)=10976

здесь нет знаков,решала как с знаками умножения

B)(-90- 40 - 20): 15= -150 :15= -10

Answer 3

Let's solve these mathematical expressions step by step:

A) (-8 + 10 - 7) / (-5)

First, perform the operations inside the parentheses: -8 + 10 - 7 = -5

Now, we have: (-5) / (-5)

When dividing two negative numbers, it becomes positive: (-5) / (-5) = 1

So, the answer is 1.

B) (-49) * 8 - (-7) * 4

First, perform the multiplications: -49 * 8 = -392 -7 * 4 = -28

Now, subtract the second result from the first: -392 - (-28)

When you subtract a negative number, it becomes addition: -392 + 28 = -364

So, the answer is -364.

C) (-90 - 40 - 20) / 15

First, perform the operations inside the parentheses: -90 - 40 - 20 = -150

Now, we have: -150 / 15

When you divide -150 by 15, you get: -150 / 15 = -10

So, the answer is -10.