Question

-1.3 + -3.8 =
5.1
-5.1
2.5


Question 6. -2.87 + 4.2 =
1.33
-1.33
-7.07


Question 7. 82.5 - -89.4 =
-7
7
171.9

Answer 1

get a calculator

Answer 2

or use google

Answer 3

-1.3 + -3.8
-1.3+(-3.8)
-1.3-3.8
?

Answer 4

reply @jayfer

Answer 5

5.1 @Nurali

Answer 6

Wrong