(1\2+1\4+5\6)×1225-25×74\75(1\2+1\4+5\6)×12
来源:学生作业帮助网 编辑:六六作业网 时间:2024/11/24 20:48:42
(1\2+1\4+5\6)×1225-25×74\75(1\2+1\4+5\6)×12(1\2+1\4+5\6)×1225-25×74\75(1\2+1\4+5\6)×12(1\2+1\4+5\6)×
(1\2+1\4+5\6)×1225-25×74\75(1\2+1\4+5\6)×12
(1\2+1\4+5\6)×1225-25×74\75
(1\2+1\4+5\6)×12
(1\2+1\4+5\6)×1225-25×74\75(1\2+1\4+5\6)×12
(1\2+1\4+5\6)×12
=1\2×12+1\4×12+5\6×12
=6+3+10
=19
25-25×74\75
=25(1-74\75)
=25×1/75
=1/3
答案是22979/12
第二个 6+3+10=19
第一个不会简便