5.3÷1.25.3 0.67÷0.80.67 0.452÷1.44.52÷14
0÷24.624.6 5.46÷61 9.34÷0.28.34÷0.2
+= ×= -= ÷=
0.18×= 4.7+0.38= 3.2÷0.1= (10﹣)×0=
10﹣0.9= 28+82= 20×5%= +×0=
4.8÷0.8= += ×= 1÷-1=