291减38乘3.5减35.5的差除以3.5用简便方法计算_数学解答

291减38乘3.5减35.5的差除以3.5用简便方法计算

人气：471 ℃　时间：2019-10-11 13:08:53

解答

291减38乘3.5减35.5的差除以3.5
=291-(38*3.5-35.5)/3.5
=291-(38*3.5)/3.5 +35.5/3.5
=291-38 +71/7
=263又1/7