8.56+7.5+2.44-2.5 0.35*2.4 8.56-7.5+2.44-2.5 3.78/2.5/0.4用简便方法计算_数学解答

8.56+7.5+2.44-2.5 0.35*2.4 8.56-7.5+2.44-2.5 3.78/2.5/0.4用简便方法计算

人气：258 ℃　时间：2019-12-12 13:12:12

解答

8.56+7.5+2.44-2.5 = (8.56 + 2.44) + (7.5-2.5) = 11 + 5 = 160.35*2.4 = 0.7 * (0.5*2.4) = 0.7 * 1.2 = 0.848.56-7.5+2.44-2.5 = (8.56 + 2.44) - (7.5+2.5) = 11 - 10 = 13.78/2.5/0.4 = 3.78/ (2.5*0.4) = 3.78