2.99.9×999+99.9
3.64×0.125×0.5×0.25
4.(二分之一+三分之一+四分之一+六分之一)×24
三分之一x+五分之一=二分之x
第1个回答 2012-08-05
解:原式=1/15*4/13+8/13*4/15+4/13*4/15
=4/15*(1/13+8/13+4/13)
=4/15*1
=4/15
=4/15*(1/13+8/13+4/13)
=4/15*1
=4/15
第2个回答 2012-08-01
1/0.125-9.2×0.4
=1/0.125-(9+0.2)×(0.2+0.2)
=8-(1.8+1.8+0.04+0.04)
=8-(3.6+0.08)
=8-3.64
=4.36
=1/0.125-(9+0.2)×(0.2+0.2)
=8-(1.8+1.8+0.04+0.04)
=8-(3.6+0.08)
=8-3.64
=4.36