Question

Alt += is used to calculate _____ of adjacent cells​

Answer 1

On assuming that the question has been asked in reference to the Microsoft Excel which is included in the Microsoft Office package. So, in it, the key combination which is "used to get" the "total of adjacent cells" is "Alt+=".

Answer 2

Answer:

On assuming that the question  asked about Microsoft Excel which is included in the Microsoft Office package. So, in it, the key combination which is "used to get" the "total of adjacent cells" is "Alt +  ="