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心算.0.5×5=0.18+0.82=2.1+0.6+7.9=0.6÷0.2=0.09×1000=0.8×3.5×0.125=1.2÷4=5.52÷100=1.3×3÷10=0.72÷6=5.52÷0.01=5÷0.5÷2=3.9-3=0.1×6.9=0.9+0.9÷0.9=
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心算. 0.5×5= 0.18+0.82= 2.1+0.6+7.9= 0.6÷0.2= 0.09×1000= 0.8×3.5×0.125= 1.2÷4= 5.52÷100= 1.3×3÷10= 0.72÷6= 5.52÷0.01= 5÷0.5÷2= 3.9-3= 0.1×6.9= 0.9+0.9÷0.9= |
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