6×0.7=4.2 6.6×6.7=44.22 6.66×66.7=444.222 6.6666×6666.7=( )。
×=
5÷0.02= 37.6-25.8= 234÷3= 45×7%=
2.4×2.5= ×5.6= ÷ = + =