Xem lại đề bài, sao trong phép tính có dấu phẩy hả bạn?
\(\dfrac{135\times142+4,5\times780\times3}{2\times1,35\times1,25:0,25\times10}\)
= \(\dfrac{135\times142+45\times3\times78}{2\times(1,35\times10)\times(1,25:0,25)}\)
= \(\dfrac{135\times142+135\times78}{2\times13,5\times5}\)
= \(\dfrac{135\times\left(142+78\right)}{\left(2\times5\right)\times13,5}\)
= \(\dfrac{135\times220}{10\times13,5}\)
= \(\dfrac{135\times220}{135}\)
= 220