(4/7-1又1/8+3/14)*56

来源：学生作业帮助网编辑：作业帮时间：2024/11/13 03:58:42

(4/7-1又1/8+3/14)*56
(4/7-1又1/8+3/14)*56

(4/7-1又1/8+3/14)*56
(4/7-1又1/8+3/14)*56
=4/7*56-1又1/8*56+3/14*56
=32-63+12
=44-63
=-19