[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/5 21-(-7)/(1/2)*2怎么做,
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[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/521-(-7)/(1/2)*2怎么做,[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/521-(-7)/(1/
[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/5 21-(-7)/(1/2)*2怎么做,
[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/5 21-(-7)/(1/2)*2怎么做,
[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/5 21-(-7)/(1/2)*2怎么做,
[(1又21/24-1又3/8+1/16-3/4)*(-4)^3]/5
=[(45/24-11/8+1/16-12/16)*(-64)]/5
=[(15/8-33/16)*(-64)]/5
=[(-3)/16]*(-64)/5
=12/5.
21-(-7)/(1/2)*2
=21+14*2
=21+28
=49.