(2.1+0.7)÷0.35
7.52÷0.4÷2.5
9.55+6.3÷7×0.5
18.75×0.125×8
5.4×(4.32÷1.2)
12.57-(3.57+3.5)
①12.5×(8+0.8)
②+×
③+÷
④26﹣7.28﹣12.72
⑤5.8×4.1+5.9×5.8
⑥÷(+1.4×)