将下面的分数化成小数:
7.05×23.7+7.05×76.3.
用简便方法计算:1.29+3.7+0.71+6.3 528×78+472×78 125×89×8 57×101.
①12.5×3.7×0.8 ②4.6×2.3+7.7×4.6③3.6+(5.7+3.8)÷0.5 ④3.6÷0.4﹣1.5×3⑤0.1÷0.2÷0.4 ⑥80.3﹣5.6×1.7.
脱式计算,能用简算的要简算.1.3×0.75×41.08÷1.8×1.250.4×1.9﹣1.80.82×0.25+1.18×0.25.
怎样简便就怎样算.0.125×4.78×80 2.8×3.6+1.4×2.8 (0.4+40)×2.578.7﹣17.7×3.6 18÷[0.3×(8﹣6.5)] 12.7+12.5+0.5.