7/12×1/7+5/12÷7

来源：学生作业学帮网编辑：学帮网时间：2024/05/14 04:52:35

7/12×1/7+5/12÷7

=7/12×1/7+5/12×1/7
=(7/12+5/12)×1/7
=1×1/7
=1/7

7/12×1/7+5/12÷7
=7/12×1/7+5/12*1/7
=（7/12+5/12）*1/7
=1*1/7
=1/7