几道计算题,1.(-5/6)÷(-19/6)÷[1/24×(-5/4)]-0.25÷1/42.-1-4/13×[-4-9]×[(-8)+0÷(-1)]3.-9×4/9÷(-0.8)+4+(-4)-(-9)

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几道计算题,1.(-5/6)÷(-19/6)÷[1/24×(-5/4)]-0.25÷1/42.-1-4/13×[-4-9]×[(-8)+0÷(-1)]3.-9×4/9÷(-0.8)+4+(-4)-(-

几道计算题,1.(-5/6)÷(-19/6)÷[1/24×(-5/4)]-0.25÷1/42.-1-4/13×[-4-9]×[(-8)+0÷(-1)]3.-9×4/9÷(-0.8)+4+(-4)-(-9)
几道计算题,
1.(-5/6)÷(-19/6)÷[1/24×(-5/4)]-0.25÷1/4
2.-1-4/13×[-4-9]×[(-8)+0÷(-1)]
3.-9×4/9÷(-0.8)+4+(-4)-(-9)

几道计算题,1.(-5/6)÷(-19/6)÷[1/24×(-5/4)]-0.25÷1/42.-1-4/13×[-4-9]×[(-8)+0÷(-1)]3.-9×4/9÷(-0.8)+4+(-4)-(-9)
=-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

1.(-5/6)×(-6/19)÷(-5/96)-0.25×4=(-5/6)×(-6/19)×(-96/5)-0.25×4=(96/19)-1=77/19