小学五年级下口算题450道(人教版)

0.62＋0.38＝0.3×5÷0.3×1＝0.62＋0.38＝0.39÷0.13＝6.2÷0.62＝2.4×0.5＝0.65×20＝2.9×0.5＝0.5＋1÷0.5＝6.1－0.01＝0.3×4÷