Question

tinh nhanh

18 x5x11 phan

10x9x22

 

Answer 1

\(\frac{18\times5\times11}{10\times9\times22}\)

\(=\frac{9\times2\times5\times11}{5\times2\times9\times11\times2}\)

\(=\frac{1}{2}\)

Vậy : \(\frac{18\times5\times11}{10\times9\times22}=\frac{1}{2}\)

Answer 2

18 x 5 x 11 = 990

10 x 9 x 22 = 1980

Answer 3

1:990

2:1980

Answer 4

=19602

Answer 5

18x5x11=(18x5)x11=90x11=990

10x9x22=(10x9)x22=90x22=1980

Answer 6

18 x 5 x 11 = 990 

10 x 9 x 22 = 1980

Answer 7

mk lộn phai =990/1980=1/2