Question

几道计算题,1.（-5/6）÷（-19/6）÷[1/24×（-5/4）]-0.25÷1/42.-1-4/13×[-4-9

Answer 1

=-5/6*-6/19*-96/5-0.25

=5/19*-96/5-0.25÷1/4

=-96/19-1

=-77-19

第二个

=-1-4/13*-13*-8

=-1+4*-8

=-1-32

=-33

第三个

=-4÷-0.8+4-4+9

=5+4-4+9

=14