①
②
③
④
⑤
⑥
①4.05÷0.81+2.4
②4.85×8×1.25
③31.9×8-0.8×19
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)
①3.86+6.4+2.14+7.6
②5.2÷0.32﹣0.12
③()×15