13 1/5×5/6+28 2/7×7/9

来源:学生作业帮助网 编辑:作业帮 时间:2024/05/09 15:29:32
13 1/5×5/6+28 2/7×7/9

13 1/5×5/6+28 2/7×7/9
13 1/5×5/6+28 2/7×7/9

 


13 1/5×5/6+28 2/7×7/9
=(13×5+1)÷6+(28×7+2)÷9
=66÷6+198÷9
=11+22
=33