Tính. 250 ml + 100 ml = ml 350 ml – 250 ml = ml 350 ml – 100 ml = ml

Lời giải

\[\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{250}\\{100}\end{array}} \\\,\,\,\,350\end{array}\]                → 250 ml + 100 ml = 350 ml               

\[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{350}\\{250}\end{array}} \\\,\,\,\,100\end{array}\]                    → 350 ml – 250 ml = 100 ml