Question

1 tính

15/16:3/8                       12/13:6            12:3/5 

2 đặt tính rồi tính 

54:45        255,5:7          98,156:4,63

81;4          10,35:23         3,95:15,8

 

Answer 1

\(\frac{15}{16}:\frac{3}{8}\)

=\(\frac{15}{16}\times\frac{8}{3}\)

=\(\frac{5}{2}\)

\(\frac{12}{13}:6\)

=\(\frac{12}{13}\times\frac{6}{1}\)

=\(\frac{12}{13}\times\frac{1}{6}\)

=\(\frac{2}{13}\)

12:\(\frac{3}{5}\)

=12\(\times\frac{5}{3}\)

=20

Answer 2

1)Tinh :15/16:3/8=15/16*8/3=15*8/16*3=120/48=5/2

12/13:6=12/13*1/6=12*1/13*6=12/78=2/13

12:3/5=12*5/3=12*5/3=60/3=20