If you're trying to solve those IBM problems from yesterday's post, you might need the help of a calculator. Luckily, there are free online calculators that you can use.

如果您想解决昨天发布的这些IBM问题 ，则可能需要计算器的帮助。 幸运的是，您可以使用免费的在线计算器。

The first one is a scientific calculator, Calculator Tab, with long-term memory that allows you describe and retrieve saved numbers.

第一个是科学的计算器，“ 计算器”选项卡 ，具有长期存储功能，可让您描述和检索保存的数字。

Click the tabs on the calculator to see the hidden functions, to save and retrieve the results, or to clear the calculator.

单击计算器上的选项卡以查看隐藏的功能，保存和检索结果或清除计算器。

There are buttons on the page, above the calculator, to view the calculator in a popup window, and to use the keyboard for input.

在计算器上方的页面上有按钮，用于在弹出窗口中查看计算器，并使用键盘进行输入。

Another free calculator is calc5, a graphing calculator. There's not much on the page when you arrive, but click the samples listed at the right, or enter your own data in the input box.

另一个免费计算器是calc5 (图形计算器)。 到达时页面上没有多少，但请单击右侧列出的样本，或在输入框中输入您自己的数据。