Question

B=1/2+3/10+4/45+11/180+1/20

Answer 1

ẦN GẤP Ạ

20 PHÚT NỮA ĐI HỌC RÙI Ạ

 

Answer 2

\(B=\dfrac{1}{2}+\dfrac{3}{10}+\dfrac{4}{45}+\dfrac{11}{180}+\dfrac{1}{20}\)

\(B=\dfrac{90}{180}+\dfrac{54}{180}+\dfrac{16}{45}+\dfrac{11}{180}+\dfrac{9}{180}\)

\(B=\dfrac{90+54+16+11+9}{180}\)

\(B=\dfrac{180}{180}\)

\(B=1\)