① ②37.5- (17.5-) ③
⑴3.64-2.25+6.36-2.75 ⑵
⑶4÷5+39× ⑷20.24×2023-20.22×2024
①(3618÷18-145)×20
②6÷ - ÷6
③(21+ )× +
④ ×[ ÷( - )]
⑤3.5×98+35×0.2
①2.4÷×
②(+﹣)×36
③×99
④29.3﹣12.6﹣7.4
⑤5.9×8.5﹣49×0.85
⑥×[6÷(﹣)]