计算下面各题（能简算的简算）818÷18=6823-9987.1+0.9×（0.9-0.75）=6.72×123-413÷0.65=3.85×214+0.15÷49=（1.35÷0.3）×(1-25)=2

Question

计算下面各题（能简算的简算）
8 (1)/(8) ÷ (1)/(8) =
6823-998
7.1+0.9×（0.9-0.75）=
6.72× 1(2)/(3) -4(1)/(3) ÷0.65 =
3.85×2(1)/(4) +0.15÷(4)/(9) =
（1.35÷0.3）× (1-(2)/(5) ) =
2(1)/(4) ÷[((5)/(6) -(3)/(4) )×1.2+0.81] =

Answer 1

（1）8 (1)/(8) ÷ (1)/(8)
= (65)/(8) ×8
=65；

（2）6823-998
=6823-1000+2
=5825；

（3）7.1+0.9×（0.9-0.75）
=7.1+0.9×0.15
=7.1+0.135
=7.235；

（4）6.72× 1(2)/(3) -4(1)/(3) ÷0.65
=6.72× (5)/(3) - (13)/(3) × (20)/(13)
= (56)/(5) -(20)/(3)
= (68)/(15) ；

（5）3.85× 2(1)/(4) +0.15 ÷(4)/(9)
=3.85× (9)/(4) +0.15× (9)/(4)
=（3.85+0.15）× (9)/(4)
=4× (9)/(4)
=9；

（6）（1.35÷0.3）×（1- (2)/(5) ）
=4.5× (3)/(5)
=2.7；

（7）2 (1)/(4) ÷[（ (5)/(6) -(3)/(4) ）×1.2+0.81]
=2 (1)/(4) ÷[ (5)/(6) ×1.2 -(3)/(4) ×1.2+0.81]
=2 (1)/(4) ÷[1-0.9+0.81]
= (9)/(4) ÷(91)/(100)
= (225)/(91) ．