Điền số thích hợp vào ô trốnga) 5,17 × 2,3 = …b) 4,27 × 1,5 = …
Giải thích
Hướng dẫn giải
a) \[\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,\,\,\,5,17}\\{\underline {\,\,\,\,\,\,\,\,2,3} }\end{array}\\\,\,\,\,\,\,\,\,1\,\,551\\\,\,\,\,\underline {10\,\,34\,\,\,} \\\,\,\,\,11,891\end{array}\] Vậy: 5,17 × 2,3 = 11,891 | b) \[\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,4,27}\\{\underline {\,\,\,\,\,\,1,5} }\end{array}\\\,\,\,2\,\,135\\\,\,\,\underline {4\,\,27\,\,\,\,} \\\,\,\,6,405\end{array}\] Vậy: 4,27 × 1,5 = 6,405 |