A.=(A3+C3+E3)/3
B.(A3+C3+E3)/3
C.=A3+C3+E3÷3
D.(A3+C3+E3)÷3
A.=A1+$B1
B.=D3+$B3
C.=A3+$E3
D.=E3+$A3
A.SUM(A3:C3)
B.SUM(A3 C3)
C.=A3+B3+C3
D.=$A$3+$B$3+$C$3
E.SUM(A3,C3)
A.SUM(A7:C7)/$C$8
B.=SUM(A7:C7)/C8
C.=SUK(A7:C7)/$C$8
D.=SUM(A3:C3)/$C$8
A.12
B.33
C.78
D.98
A.求和区域
B.条件区域
C.筛选区域
D.数组区域