计算下面各题，并且验算。

 5/8-1/3=        4.5×5.02=

[主观题]计算下面各题，并且验算。1624÷56=5/6×4/7=

[主观题]计算下面各题。3/4+5/6=2/3-1/4=4/5+11/15+3/10=7-5/7=1/2+2/3=6-（3/4-2/5）=

计算下面各题。-|||-div dfrac (11)(8)=-|||-dfrac (2)(5)times dfrac (1)(2)=-|||-dfrac (3)

计算下面各题． (2)/(9)×(3)/(5)(6)/(7)×(7)/(9)(5)/(8)×(4)/(15)(9)/(20)×(5)/(21)(6)/(5)×(

6 计算下面各题并验算。0.39×2.9 0.58×0.08 3.7×2000.18×8.45 4.5×0.002 0.072×0.156 计算下面各题

[主观题]计算下面各题，看谁算的都对。

计算下列各题：（1）sqrt((1)/(4))×sqrt(144)；（2）3sqrt(2)×5sqrt(8)；（3）5sqrt(x)•6sqrt((x)^3)；

1.用简便算法计算下面各题。(2)/(9) - (7)/(16) times (2)/(9)(2)/(5) times 4 times (3)/(4)(5)/(

[试题]计算下面各题1.08×0.8÷0.27= 0.864÷0.27=2.05÷0.82+33.6= 2.5+33.6=

[试题]计算下面各题0.75×18÷0.15= 13.5÷0.15=2.07÷0.23÷0.45= 9÷0.45=21.36÷0.8－12.9= 26.7－12.9=7.28﹢3.2÷2.5= 7.28﹢1.28=