①(3.2+1.2)÷0.8
②3.6÷0.4-1.2×5
③18÷(3.6-1.8)
④29÷(0.8×25)
0.125×3.2×0.25 28.4×99+28.4
13÷0.4÷2.5 20.9+10.5÷(5.2-3.7)
(3.2+2.4)÷0.8
0.25×4÷0.25×4
16.5×7.5÷(1.1×2.5)
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)
① []
②4.6+7.68﹣1+2.32
③1.25×2.5×0.4×8
④9.5×20%+