1、3.8×4.5+0.45×38+0.038×10
问题描述:
1、3.8×4.5+0.45×38+0.038×10
2、6.3×2.7-7.5×5.3+4.8×6.3
3、28.67×67+3.2×286.7+573.4×0.05
4、99.9×88.8×77.7×66.6+66.6×55.5
99.9×88.8×+88.8×77.7+77.7×66.6+66.6×55.5
答
1、3.8×4.5+0.45×38+0.038×10=0.38*45+0.38*45+0.38*1=0.38*90+0.38=0.38*(100-10)+0.38=38-3.8+0.38=34.2+0.38=34.582、6.3×2.7-7.5×5.3+4.8×6.3=6.3*(2.7+4.8)-7.5*5.3=7.5(6.3-5.3)=7.53、28.67×67+...