①4.7-1.66-2.34
②4.8+7.44+2.56+5.2
③43000÷125÷8
④36×54+36+45×36
⑤(124-76)×23÷24
⑥270×[128÷(88-24)]
①3.16+2.25+7.75
②5×32×125
③34×99+34
④56×8÷56×8
⑤12.39-(8.39+0.56)
⑥2600÷5÷20
①﹣+-
②(﹣)×18×12
③2×1.5+4.5÷0.75
④69×9.9+6.9