
简算(急!!!!!!!!!!!!)
(1)5又9分之4-3又5分之2+4又9分之5-1又5分之3(2)1273/31+900/31+28/31(3)12.5*0.35*0.5*64...
(1)5又9分之4-3又5分之2+4又9分之5-1又5分之3
(2)1273/31+900/31+28/31
(3)12.5*0.35*0.5*64 展开
(2)1273/31+900/31+28/31
(3)12.5*0.35*0.5*64 展开
1个回答
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(1)5又9分之4-3又5分之2+4又9分之5-1又5分之3
=5又9分之4+4又9分之5-3又5分之2-1又5分之3
=10-5
=5
(2)1273/31+900/31+28/31
=(1273+900+28)/31
=2201/31
=71
(3)12.5*0.35*0.5*64
=12.5×8×0.35×4×0.5×2
=100×1.4×1
=140
=5又9分之4+4又9分之5-3又5分之2-1又5分之3
=10-5
=5
(2)1273/31+900/31+28/31
=(1273+900+28)/31
=2201/31
=71
(3)12.5*0.35*0.5*64
=12.5×8×0.35×4×0.5×2
=100×1.4×1
=140
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