
口算1.5×4
口算.1.5×0.4=24×0.5=4.15×0=0.25×50=1.475×1000=0.03×0.1=0.5×0.25×4=0.1×0.1×0.1=1.25×0.8=...
口算. 1.5×0.4= 24×0.5= 4.15×0= 0.25×50= 1.475×1000= 0.03×0.1= 0.5×0.25×4= 0.1×0.1×0.1= 1.25×0.8= 0.2×0.5=
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