口算:28×0.5= 0.18÷0.6= 1-0.47+0.53= 16.5×9+16.5= 3.6-3.6÷1.2= 1÷0.5= (6.9-6.9)×74.8= 15
口算:28×0.5=0.18÷0.6=1-0.47+0.53=16.5×9+16.5=3.6-3.6÷1.2=1÷0.5=(6.9-6.9)×74.8=15-9.4+0....
口算:28×0.5= 0.18÷0.6= 1-0.47+0.53= 16.5×9+16.5= 3.6-3.6÷1.2= 1÷0.5= (6.9-6.9)×74.8= 15-9.4+0.6= 4.99-2.6-1.4= 125×3×8= 8.6÷8.6+8.6= 0.25×4÷0.25×4=
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