=( 105/ 13-3/ 1 1* 105/ 13)+3/ 1 1* 105/ 13

= 105/ 13-3/ 1 1* 105/ 13+3/ 1 1* 105/ 13

= 105/ 13*( 1-3/ 1 1+3/ 1 1)

= 105/ 13

22.5+(3 5+ 1.8+ 1.2 1× 1 1 5)÷40%

=[22.6+(3+3/5+ 1+4/5+ 12 1/ 100*5/ 1 1)]÷2/5

=[22+3/5+(4+7/5+ 1 1/20)]÷2/5

=[22+3/5+4+7/5+ 1 1/20]÷2/5

=[28+ 1 1/20]÷2/5

=[28+ 1 1/20]*5/2

=28*5/2+ 1 1/20*5/2

=70+55/40

=7 1+ 15/40

=7 1 and 15/40

[(0.5+ 1/5-0.25)*20]/( 1+5/6)

=[( 1/2+ 1/5- 1/4)*20]/( 1+5/6)

=[ 1/2*20+ 1/5*20- 1/4*20]/( 1+5/6)

=( 10+4-5)/( 1 1/6)

=9/( 1 1/6)

=9*6/ 1 1

=54/ 1 1

1.5× 1(2 and 65438+ 1-2.05)+2/5.

= 1.5*[ 1÷(2+0. 1-2.05)+2/5]

= 1.5*[ 1÷(2. 1-2.05)+2/5]

= 1.5*[ 1÷(0.05)+2/5]

= 1.5*[ 1÷( 1/20)+2/5]

= 1.5*[ 1*20+2/5]

=3/2*[20+2/5]

=3/2*20+3/2*2/5

=30+3/5

=30 3/5