3×0.7=2.1 3.3×6.7=22.11 3.33×66.7=222.111 3.333×666.7=
①15.12÷4.5=
②0.54÷0.5=
③77.4÷0.4=(*验算)
④0.27÷1.1≈(保留两位小数)#