连环套.(1)(2)(3)
2011÷125.
简便计算375﹣98500﹣56﹣4489+233+511+377+567+123.
①1993+1994+1995+1996+1997+1998+1999+2000=②(0.75×42.7+57.3﹣0.573×25)÷3×7972=
计算.0.25×0.03×4 13×3.89+0.13×100+1.3×51.1 10.1×87.
63×.