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Addition, subtraction, and multiplication problems
Reading time: 1minHere's a simple addition problem that spaces the "+" away from the operand by using the element none:
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<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:
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<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:
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<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>×</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:
- We specified loose spacing between the characters on the
mstacktag; absolute values such as "10px" can also be given. - The carries are shifted over; we could also have used an
msrowandnone, but specifying a position is simpler. - The '874' uses
msrowto shift the number over one column, but a "0" could have been added and this would not have been needed; alternatively, msgroup with shift="1" could have been used, similar to what is done in the long division problem in our next example.