Question

求出下列每对数在数轴上对应点之间的距离

Answer 1

（1）3与-2.2

=|3-(-2.2)|

=|3+2.2|

=5.2

（2）4.75与2.25

|4.75-2.25|

=|25.5|

=2.5

（3）-4与-4.5

|(-4)-(-4.5)|

=|-4+4.5|

=0.5

（4）-3又2/3与+2又1/3

|(-3又2/3)-(+2又1/3)|

=|-6|

=6