①0.25×0.58×40
②17.8×99
③6.28×7.5+6.28×2.5
4.2÷0.25×0.8
(0.09+1.29)÷0.23
50.4÷(5.6×2.5)
93÷0.31÷3
①(3618÷18-145)×20
②6÷ - ÷6
③(21+ )× +
④ ×[ ÷( - )]
⑤3.5×98+35×0.2
①
②36×()
③
④
⑤3.24×0.76+3.24×0.24
⑥