48÷【(-6)-4】
=48÷(-10)
=-4.8
(-81)÷(+3又1/4)*(-4/9)÷(-1又1/13)
=(-81)*4/13*(-4/9)*(-13/14)
=36*2/7
=72/7 2/5÷(-2又2/5)-1/28*(-1又3/4)-0.75=2/5*(-5/12)-1/28*(-7/4)-3/4=-1/6+1/16-3/4=-1/6-11/16=-8/48-33/48=-41/48
48÷【(-6)-4】
=48÷(-10)
=-4.8
(-81)÷(+3又1/4)*(-4/9)÷(-1又1/13)
=(-81)*4/13*(-4/9)*(-13/14)
=36*2/7
=72/7 2/5÷(-2又2/5)-1/28*(-1又3/4)-0.75=2/5*(-5/12)-1/28*(-7/4)-3/4=-1/6+1/16-3/4=-1/6-11/16=-8/48-33/48=-41/48