Số “Chín triệu không trăm linh hai nghìn bảy trăm tám mươi sáu” viết là:  

356 497 + 1 237 012

\[\begin{array}{l} + \begin{array}{*{20}{c}}{\,\,\,\,356\,\,497}\\{\underline {1\,\,237\,\,012} }\end{array}\\\,\,\,\,\,1\,\,593\,\,509\end{array}\]

6 710 349 - 564 021

\[\begin{array}{l} - \begin{array}{*{20}{c}}{6\,\,710\,\,349}\\{\underline {\,\,\,\,\,\,564\,\,021} }\end{array}\\\,\,\,\,\,6\,\,146\,\,328\end{array}\]

567 123 × 27

\[\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,\,\,\,\,\,\,567\,\,123}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,27} }\end{array}\\\,\,\,\,\,\,3\,\,969\,\,861\\\,\,\,\underline {11\,\,342\,\,46\,\,\,} \\\,\,\,15\,\,312\,\,321\end{array}\]

4 980 346 : 56