Respuesta :

Answer:0.1

Step-by-step explanation:

Substract ,add & divide

Ushao

Answer:

[tex]2.5 + (7 - 9) = (2.5 - 2) \div 5 = 0.5 \div 5 = 0.1[/tex]

Step-by-step explanation:

无脑代入求值7-9=-2移除括号变号