①63.7﹣5.8﹣4.2
②×+÷11
③(++)×24
④5.96×[1÷(2.1﹣2.09)]
1.25×0.25×4×8
5.9×63+59×3.7
÷[×(-)]
①7.3-2.05+0.82
②3×÷3×
③3.68×6.7+ 63.2×0.67
①0.53×2.5+
②25×0.032×12.5
③ [()×]
④6.83+17.9﹣0.83+32.1