2.脱式计算。-|||-times dfrac (97)(99)-|||-dfrac (10)(21)times dfrac (7)(20)div dfrac (5)(6)+dfrac (1)(4)-|||-./fujian/20260427/zyb_a40dc135bde5955229f293b1ac51fe36.jpg-dfrac (5)(8)div dfrac (25)(28)-dfrac (3)(10)

用简便方法计算.-|||-dfrac (7)(10)times dfrac (1)(6)+dfrac (3)(10)div 6

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

[题目]-|||-计算:-|||-dfrac (1)(1times 2)+dfrac (2)(2times 4)+dfrac (3)(4times 7)+dfr

1.计算:-|||-(1) times ((dfrac {1)(2)-dfrac (1)(3))}^2;-|||-(2) .7div (-dfrac (8)(1

计算：(1)(-0.02)times (-20)times (-5)times 4.5；(2)(-6.5)times (-2)div (-dfrac(1)(3)

填空-|||-dfrac (1)(3)times 3div dfrac (1)(3)times 3= __

8.计算:-|||-(1) times (-5)-(-3)div dfrac (3)(128)-|||-(2) -7times (-3)times (-0.5)

dfrac (1)(5)(X)_(1)+dfrac (2)(5)(X)_(2)+dfrac (2)(5)(X)_(3)-|||-D .dfrac (1)(7)(

[题目]计算:-|||-(1) ((-1))^100times 5+((-2))^4div 4 ;-|||-(2) ((-3))^3-3times ((-dfr

( x , y ) 的联合分布律为：Y x -7 2-|||--7 dfrac (5)(20) dfrac (2)(20) .dfrac (6)(20)-||