Question

1) 18+(-9); 2) -5,2+(-7,6); 3) -2,8+(1,5+4; СРОЧНО ПОЖАЛУЙСТА ОЧЕНЬ НУЖНО

Answer 1

1) 18 + (-9)

To solve this addition problem, we simply add the two numbers together. In this case, we have 18 and -9. Adding these two numbers gives us 9.

2) -5.2 + (-7.6)

Similar to the previous problem, we add the two numbers together. In this case, we have -5.2 and -7.6. Adding these two numbers gives us -12.8.

3) -2.8 + (1.5 + 4)

To solve this expression, we first perform the addition inside the parentheses, which is 1.5 + 4 = 5.5. Then, we add -2.8 to 5.5, which gives us 2.7.

I hope this helps! Let me know if you have any further questions.