①12.5×4.8
②28.5÷15×5.6
③21÷0.25÷0.4
④0.55×5.6+0.45×5.6
⑤24.6×18-24.6×8.
⑥20.9+8.5÷(5.2-3.5)
①2.75-0.75×1.2
②0.64×1.5÷0.32
③30-7.38÷3.6×2
④3.14×0.32-3.14×0.22
⑤2.4÷0.15+2.4÷0.25
⑥(0.9-0.15×0.6)÷0.01
①
②1.25×1.3×80
③7.28-3.14+1.72-2.86
④
⑤
⑥