Question

TÍNH:

A=(19 5/8 : 7/12 - 13 1/4 : 7/12) .4/5

GIẢI GIÚP MÌNH NHA, GẤP LẮM !

Answer 1

A=(19 5/8 : 7/12 - 13 1/4 : 7/12) .4/5

  =(19 5/8 - 13 1/4):7/12.4/5

  =51/8.12/7.4/5

  =153/14.4/5

  =306/35

Answer 2

A={19 5/8 :7/12-13 1/4:7/12}.4/5

={19 5/8-13 1/4}:7/12.4/5

=51/8.12/7.4/5

=153/14.4/5

=306/35

MAGICPENCIL,k hen bạn