口算.2.5×0.6×0.4= 1.25×O.7×O.8= 0.1×0.2×0.3= 5.4-0.4×5= 0.26×O.2×50= 0.5×0.75×4= 12
口算.2.5×0.6×0.4=1.25×O.7×O.8=0.1×0.2×0.3=5.4-0.4×5=0.26×O.2×50=0.5×0.75×4=12.5×0.1×0.8...
口算.2.5×0.6×0.4= 1.25×O.7×O.8= 0.1×0.2×0.3= 5.4-0.4×5= 0.26×O.2×50= 0.5×0.75×4= 12.5×0.1×0.8= 0.4×0.1×0.25=
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