(-7)+(+4)=-5 (-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 two numbers: .3. - To solve this, we subtract 9 from 7: .4. - To solve this, we add the two numbers: .5. - To solve this, we add the two numbers: .6. - To solve this, we subtract 3 from 6: .7. - To solve this, we add the two numbers: .So, the correct answers are:1. 2. 3. 4. 5. 6. 7.