Ответ:

Пошаговое объяснение:

б) (1 3/8*2)/11=(11*2)/8÷11/1=

=11*2/8*11=2/8

г) (8 1/3÷2)/(1 9/10+4 7/20)=

=(25/3÷2/1)/(38/20+87/20)=

=(25/6)/(125/20)=

=25/6÷25/4=

=(25*4)/(6*25)=

=4/6=

=2/3

в) (4-1 3/5)/(7 1/2*9/25)=

=(4/1-8/5)/(15/2*9/25)=

=(20/5-8/5)/((15*9)/(2*25))=

=(12/5)/((3*5*9)/(2*5*5))=

=12/5÷27/10=

=(12*10)/(5*27)=

=(3*4*2*5)/(5*3*9)=

=(4*2)/9=

=8/9

е) (3 4/7÷(6 1/28-3 3/4))/

/((1 5/6*1 5/22)÷18*5)=

=(25/7÷((6*28+1)/28-15/4)/

/((11/6*27/22)÷18*5)=

=(25/7÷(169/28-105/28))/

/((297/132)÷18*5)=

=(25/7÷64/28)/(297/2376*5/1)=

=(25/7÷16/7)/(1485/2376)=

=25/16÷625/100=

=25*100/16*625=

=25*25*4/16*25*25=

=4/16=

=1/4