Respuesta :

bekkarmahdi702

Answer:

-0.7

Step-by-step explanation:

● -9 + 8.3

Notice that 8.3 = 8 + 0.3

● -9 + (8 + 0.3)

● -9 + 8 + 0.3

-9 + 8 is -1

● (-9 + 8) + 0.3

● -1 + 0.3

-1 is (-0.3 -0.7)

● -0.3 - 0.7 +0.3

● -0.7