MathPlayer displays MathML-based formulas visually within the browser and passes the structure and content of these formulas along to screen readers for audible rendering to students who are blind. Among the most popular web browsers, Mozilla Firefox directly supports MathML, whereas Microsoft Internet Explorer requires the plug-in Design Science's MathPlayer. MathML is gaining widespread support among math editors, and converters have been developed for those that don't support MathML natively.
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For Braille users, MathML supports various Braille math formats, subject to Braille translation software support. MathML also allows the synthetic speech user to set different verbosity levels, automatically adjusts for the user's native language, and supports aural navigation through complex math equations for better understanding. MathML equations will, for instance, increase in size as users change font size to increase readability. MathML is therefore able to provide sufficient information and structure of the math to support both visual display and assistive technology access. MathML is composed of a number of Extensible Markup Language (XML) tags that provide the means to mark up an equation in terms of both presentation and semantics, thus enabling the expression of the information content or meaning behind equations and not just the visual representation.
Although alternate text descriptions (commonly in the form of "alt tags") can be added to these images, this approach has drawbacks because text does not always provide true comparable access to information found in mathematical notation. Such a practice is problematic because graphical images are inherently inaccessible.
Using MathML provides the highest level of accessibility to math within digital documents.īefore the advent of MathML, web authors often resorted to inserting graphical images, basically digital "pictures" of equations taken from other software products, into their documents. MathML is needed because HTML has no means of marking up mathematical expressions. Like the more familiar HyperText Markup Language (HTML), which sets the standard for web browsers to display literary text, MathML is an international open standard for encoding math content. " & MOD(A1,12) & " in.MathML (Mathematical Markup Language) is an industry standard adopted by the World Wide Web Consortium (W3C) as the approved way of expressing math on the web. In another cell you could use a formula, such as the following, to display an inches-only value as feet and inches: You could then do any number of math functions on these values. For instance, if you had a length of 5 feet 6 inches, you would put the value 66 in a cell. Since the sum of the inches would most likely exceed 12, you could, in a different cell, adjust the finished feet and inches as necessary.Īnother approach is to simply work in inches, which is the lowest common denominator. In this way it is relatively easy to add the values in the columns-one would simply be the sum of feet, and the other the sum of inches. You can, of course, use separate columns for feet and inches. The following site was among those suggested by different ExcelTips subscribers:
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These, of course, would require learning exactly how to use them to achieve what you want.
A quick search of the Internet reveals that there are a number of Excel add-ins that you can find-some for free-that will do real math for feet and inches. In other words, you can't tell Excel to consider a column as "feet and inches" and then have it automatically add a set of cells containing lineal feet. If you are looking for a way to make Excel do things like math using feet and inches, there is no native ability to do that. If you work in one of the construction trades, you may wonder if there is a way to have Excel work in feet and inches.
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