/sci/ - Science & Math

same anon as >>14633141
Running into another problem now. Wondering how I should fix this?
I want the operators and equal signs to be aligned and want them in nice aligned columns
Also how do I fix the issue of the alignat going off the page?
\begin{alignat*}{11}
1375&-409&{}= 966&& \hspace{5em} 28&\times22&{}= 616&& \hspace{5em} 928 &+ 613&{}=1541&& \hspace{5em} 210&\div10&{}= 21\\
650 &+ 991&{}=1641&& \hspace{5em} 25&\times16&{}= 400&& \hspace{5em} 500 &+ 427&{}=927&& \hspace{5em} 20&\times19&{}= 380\\
16&\times6&{}= 96&& \hspace{5em} 375&\div25&{}= 15&& \hspace{5em} 728&\div26&{}= 28&& \hspace{5em} 20&\times20&{}= 400\\
\end{alignat*}