求数学帝!:1.2.3.4.5和加减乘除括号(符号只能用一次)列一个结果为22的...答:Elementary school arithmetic, we know the natural numbers 1,2,3, ... ..., scores of 1 / 2, 2 / 3, ... ..., decimal 0.5,1.3, ... ..., pi π = 3.1415926 ... ..., the regular use these numbers to + ,-,×,÷ arithmetic. The mathematical symbols have ...