直接写得数.2.5×0.4×0.8=0.5×0.3=0.8×6=0.88+0.12=0.5+5×0.2=4.5×8=3.2×0.4=1.8-1.8=1.25×0.4×
直接写得数.2.5×0.4×0.8=0.5×0.3=0.8×6=0.88+0.12=0.5+5×0.2=4.5×8=3.2×0.4=1.8-1.8=1.25×0.4×8=...
直接写得数.2.5×0.4×0.8=0.5×0.3=0.8×6=0.88+0.12=0.5+5×0.2=4.5×8=3.2×0.4=1.8-1.8=1.25×0.4×8=0.9×50=3.6×0.1=2.5×0.8=
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