Question

\(\dfrac{17,8.3,7-7,8.4,8+17,8.5,7-7,8.4,6}{4,7.6,5+4,7.2,5+4,7}\)            đố mấy bạn làm á

Answer 1

\(\dfrac{17,8.3,7-7,8.4,8+17,8.5,7-7,8.4,6}{4,7.6,5+4,7.2,5+4,7}\)

=\(\dfrac{17,8.3,7+17,8.5,7-7,8.4,8-7,8.4,6}{4,7\left(6,5+2,5+1\right)}\)

=\(\dfrac{17,8\left(3,7+5,7\right)-\left[7,8\left(4,8+4,6\right)\right]}{47}\)

=\(\dfrac{17,8.9,4-7,8.9,4}{47}\)

=\(\dfrac{9,4\left(17,8-7,8\right)}{47}\)

=\(\dfrac{9,4.10}{47}=\dfrac{94}{47}=2\)

 

Answer 2

giải giúp e với ạ