Question

+(3-8+7) , +9-3+8+7) , +(-10-12=1)

Answer 1

Ответ:

+(3-8+7)=-5+7=2 ,

+9-3+8+7)=6+8+7=6+15=21 ,

+(-10-12=1) -  а вот тут не понял: 10-12=-2 - данное равенство неверное.

Пошаговое объяснение:

Answer 2

Let's calculate the expressions you've provided:

1. +(3-8+7): First, we evaluate the expression inside the parentheses: 3 - 8 + 7 = -5 + 7 = 2 Then, we have a plus sign in front of it, so it remains positive: +2

2. +9-3+8+7: We can simply calculate this expression from left to right: 9 - 3 + 8 + 7 = 6 + 8 + 7 = 14 + 7 = 21 So, the result is +21.

3. +(-10-12=1): Here, we have a negative sign in front of the expression inside the parentheses. First, evaluate the expression inside the parentheses: -10 - 12 = -22 Then, since there's a negative sign in front of it, the result becomes positive: +22

So, the results are:

1. +2
2. +21
3. +22