计算下列各题,能简算的要简算。(1)884÷34+17×21(2)1.25×3.2×0.25(3)()÷+(4)4÷5+39×(5)4.2﹣1.38+5.8﹣4.62(6)2÷﹣÷2
4935÷47+5.4×8.5
0.56×=
÷50%=
11.75-1.7=
3.6×0.25×4=