Instead of writing =SUM(A1:B1) you can write =A1 + B1. Parentheses (round brackets) can also be used. The result of the formula =(1+2)*3 produces a different result from =1+2*3.
此外，还可以使用括号。公式 =(1+2)*3 与 =1+2*3 的计算结果是不同的。