(-) 3 + 1 - 7 + 2 + 4 =
注意(-)是一个键 在计算器上可以找到的 按0-3也可以 标准的是我这个 还要注意等于号啊
用计算器计算式子-3+1-7+2+4时,按键顺序是?
用计算器计算式子-3+1-7+2+4时,按键顺序是?
数学人气:238 ℃时间:2019-12-18 22:50:09
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