几道简算题51．53.5×35.3＋53.5×43.2＋78.5×46.52．235×12.1＋+235×42.2－135×54._数学解答

几道简算题5
1．53.5×35.3＋53.5×43.2＋78.5×46.5
2．235×12.1＋+235×42.2－135×54.3
3．3.75×735－3/8×5730＋16.2×62.5

人气：361 ℃　时间：2020-03-29 00:58:27

解答

53.5×35.3＋53.5×43.2＋78.5×46.5=53.5×（35.3＋43.2）＋78.5×46.5=53.5×78.5+78.5×46.5=(53.5+46.5)×78.54=100×78.54=7850235×12.1＋+235×42.2－135×54.3=235×(12.1＋42.2)－135×54.3=235×54.3-135...