Question

能简算的要写出简算过程.

Answer 1

1,=5/(5/6)+5/(5/9) =6+9=152,=4/9(1-(7/16)) =(4/9)*(9/16) =1/43,=(2000+13)*(13/2012) =2000*(13/2012)+13*(13/2012) =(26000/2012)+(169/2012) =26169/20124,=(2/9)*(3/8)/(6/7) =1/14