Question

tính \(\left(\frac{5}{12}+1\frac{4}{3}-0,25\right):\frac{5}{8}-75\%\)

Answer 1

Chú ý : 1 và 4/3 = 1 + 4/3 = 7/3 

( 5/12 + 1+4/3 - 0 ,25 ) : 5/8 - 75% 

= ( 5/12 + 7/3 - 1/4 ) . 8/5 - 3/4

= ( 5/12 + 28/12 - 3/12 ) . 8/5 - 3/4

=      30/12 . 8/5 - 3/4

=           4 - 3/4 

= 16/4 - 3/4 

=  13/4 

Answer 2

=(5/12+7/3-1/4):5/8-3/4

=(5/12+28/12-1/4):5/8-3/4

=(33/12-1/4):5/8-3/4

=(33/12-3/12):5/8-3/4

=30/12:5/8-3/4

=5/2:5/8-3/4

=5/2x8/5-3/4

=4-3/4

=4/1-3/4

=16/4-3/4

=13/4