①59×101
②4×+4×
③×[÷(—)]
④12.5×32×2.5
⑴3.64-2.25+6.36-2.75 ⑵
⑶4÷5+39× ⑷20.24×2023-20.22×2024
①6.4×2.5×1.25
②8.5×98%
③÷4+×
④×
①15.28﹣3.6﹣3.4
②()×7.2
③
④7.5÷[(6.8﹣4.3)×0.12]