Addition, subtraction, and multiplication problems

Here's a simple addition problem that spaces the "+" away from the operand by using the element none:

<mstack> <mn>496</mn> <msrow> <mo>+</mo> <none/> <mn>28</mn> </msrow> <msline/> </mstack>

Here's a more complicated subtraction problem that shows carries and borrows and crossouts:

<mstack> <mscarries location="nw"> <none/> <mscarry crossout="updiagonalstrike" location="n"> <mn>2</mn> </mscarry> <mn>1</mn> <none/> </mscarries> <mn>2,327</mn> <msrow> <mo>-</mo> <mn> 1,156</mn> </msrow> <msline/> <mn>1,171</mn> </mstack>

Notice that the carry/borrow default of "n" (north/above) is changed to the "nw" (northwest) position by mscarries, but that is overridden for the borrow and changed back to "n". The carry/borrow can be in any compass position. Several different styles for crossouts are possible.

Here's a multiplication problem that shows multiple rows of carries:

<mstack charspacing="loose"> <mscarries position="1"> <mn>1</mn> </mscarries> <mscarries position="1"> <mn>1</mn> <mn>3</mn> </mscarries> <mn>435</mn> <msrow> <mo>&#xD7;</mo> <none/> <mn>25</mn> </msrow> <msline/> <mscarries position="2"> <mn>1</mn> </mscarries> <mn>2185</mn> <msrow position="1"><mn>874</mn></msrow> <msline/> <mn>10925</mn> </mstack>

There are a few things to note about this example: