39×0.839 1.2330.42×1.20.42÷1.2 6.69÷62.23÷2
①0.12×500= ②10÷0.1= ③2.4÷0.3= ④6.87+2.2﹣0.87=
⑤0.3×0.3= ⑥9.1+8.9= ⑦2.5×16= ⑧0×8×4.5=