0.56÷0.8=
8+2.4=
7.2÷9=
0.7×0.9=
2.1-0.5=
3.4÷0.1=
25×0.4=
21.3÷3=
①(3618÷18-145)×20
②6÷ - ÷6
③(21+ )× +
④ ×[ ÷( - )]
⑤3.5×98+35×0.2