一段木料长8米,先用去全长的,又用去米,一共用去多少米?
用简便方法计算.(1)2.3×7.6+2.3×12.4(2)1.25×3.2(3)8.3×0.125×8(4)5.9×101﹣5.9(5)1.35+0.89+2.11(6)5.12﹣3.43+2.88.
400﹣98=
用简便方法计算:5.6×0.38+0.56×4.7+0.056×15.
用简便的方法计算下面各题4,5×0.9+5.5×0.9 7.69×101 2.5×(7.2×0.04)72×l.25 0.26×10.1﹣0.26×0.1 0.25+39×0.25.
简便计算.1﹣().