直接写得数.10.1+0.9=5.2×0.5=0.25×8=0.7×0.7=4.62-2.52=1.8x-x=3.6÷1.8=0.2÷4=12-2.9-4.1=1÷0.1
直接写得数.10.1+0.9=5.2×0.5=0.25×8=0.7×0.7=4.62-2.52=1.8x-x=3.6÷1.8=0.2÷4=12-2.9-4.1=1÷0.1...
直接写得数.10.1+0.9=5.2×0.5=0.25×8=0.7×0.7=4.62-2.52=1.8x-x=3.6÷1.8=0.2÷4=12-2.9-4.1=1÷0.1÷0.2=3.6÷1.8=0.2÷4=
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