口算.4.2÷7= 0.42÷3= 7.2÷0.4= 5.4÷6= 0.09÷6= 8.1÷0.3= 5.6÷8= 0.72÷6= 9.1÷0.7=
口算.4.2÷7=0.42÷3=7.2÷0.4=5.4÷6=0.09÷6=8.1÷0.3=5.6÷8=0.72÷6=9.1÷0.7=6.3÷9=0.45÷3=8.4÷0....
口算.4.2÷7= 0.42÷3= 7.2÷0.4= 5.4÷6= 0.09÷6= 8.1÷0.3= 5.6÷8= 0.72÷6= 9.1÷0.7= 6.3÷9= 0.45÷3= 8.4÷0.6= 7.2÷8= 0.52÷4= 6.5÷0.5= 0.57÷0.3=
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