(+9)+(+1)=-4 (-7)+(+4)= (-5)+(+3)= (+7)+(-9)= (-7)+(+7)= (+1)+(+4)= (+6)+(-3)= (-9)+(-4)=

Let's solve each of the given expressions step by step:1. - This expression is incorrect. The correct calculation is .2. - To solve this, we add the numbers considering their signs: 3. - To solve this, we add the numbers considering their signs: 4. - To solve this, we add the numbers considering their signs: 5. - To solve this, we add the numbers considering their signs: 6. - To solve this, we add the numbers considering their signs: 7. - To solve this, we add the numbers considering their signs: 8. - To solve this, we add the numbers considering their signs: So, the correct answers are:1. 2. 3. 4. 5. 6. 7. 8.